{"id":2210,"date":"2024-03-05T15:29:20","date_gmt":"2024-03-05T15:29:20","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=2210"},"modified":"2024-03-05T15:29:20","modified_gmt":"2024-03-05T15:29:20","slug":"four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/","title":{"rendered":"Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a97ddb885a39\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    1                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    2                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    3                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    4                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is (b) 2.<\/p>\n<p>Four years ago, the total age of the family was $4 \\times 18 = 72$ years. The present total age of the family is still 72 years. If the baby is $x$ <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> years old, then the present total age of the family is $4 \\times 18 + x$. Therefore, $4 \\times 18 + x = 72$. Solving for $x$, we get $x = 2$.<\/p>\n<p>Option (a) is incorrect because 1 year is not enough time for a baby to grow to the point where it would significantly affect the average age of the family. Option (c) is incorrect because 3 years is not enough time for a baby to grow to the point where it would significantly affect the average age of the family. Option (d) is incorrect because 4 <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> years is the age of the baby four years ago, not the present age of the baby.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)<\/title>\n<meta name=\"description\" content=\"Four years ago, the total age of the family was $4 times 18 = 72$ years. The present total age of the family is still 72 years. If the baby is $x$ years old, then the present total age of the family is $4 times 18 + x$. Therefore, $4 times 18 + x = 72$. Solving for $x$, we get $x = 2$.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)\" \/>\n<meta property=\"og:description\" content=\"Four years ago, the total age of the family was $4 times 18 = 72$ years. The present total age of the family is still 72 years. If the baby is $x$ years old, then the present total age of the family is $4 times 18 + x$. Therefore, $4 times 18 + x = 72$. Solving for $x$, we get $x = 2$.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-05T15:29:20+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)","description":"Four years ago, the total age of the family was $4 times 18 = 72$ years. The present total age of the family is still 72 years. If the baby is $x$ years old, then the present total age of the family is $4 times 18 + x$. Therefore, $4 times 18 + x = 72$. Solving for $x$, we get $x = 2$.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/","og_locale":"en_US","og_type":"article","og_title":"Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)","og_description":"Four years ago, the total age of the family was $4 times 18 = 72$ years. The present total age of the family is still 72 years. If the baby is $x$ years old, then the present total age of the family is $4 times 18 + x$. Therefore, $4 times 18 + x = 72$. Solving for $x$, we get $x = 2$.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-03-05T15:29:20+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/","url":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/","name":"Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2024-03-05T15:29:20+00:00","dateModified":"2024-03-05T15:29:20+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Four years ago, the total age of the family was $4 \\times 18 = 72$ years. The present total age of the family is still 72 years. If the baby is $x$ years old, then the present total age of the family is $4 \\times 18 + x$. Therefore, $4 \\times 18 + x = 72$. Solving for $x$, we get $x = 2$.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/four-years-ago-the-average-age-of-a-family-of-four-members-was-18-years-during-this-period-a-new-baby-was-born-if-at-present-the-average-age-of-the-family-is-the-same-as-it-was-four-years-ago-then\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"mcq","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/"},{"@type":"ListItem","position":3,"name":"Algebra","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/algebra\/"},{"@type":"ListItem","position":4,"name":"Four years ago the average age of a family of four members was 18 years. During this period a new baby was born. If at present the average age of the family is the same as it was four years ago, then the present age of the baby is (yrs.)"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/2210"}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=2210"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/2210\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=2210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=2210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=2210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}