In a test consisting of 150 questions, Neha answered 40% of the first 90 questions correctly. What per cent of the 60 questions does she need to answer correctly for her score in the entire test to be 60% ?
75
80
85
90
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CAPF – 2019
Total correct answers required = 0.60 * 150 = 90.
In the first 90 questions, she answered 40% correctly.
Number of correct answers in the first 90 questions = 0.40 * 90 = 36.
The number of remaining questions is 150 – 90 = 60.
To achieve a total of 90 correct answers, she needs an additional 90 – 36 = 54 correct answers from the remaining 60 questions.
The percentage of correct answers needed from the remaining 60 questions is (Number of correct answers needed / Total remaining questions) * 100.
Percentage = (54 / 60) * 100 = (9 / 10) * 100 = 90%.