For a certain year, the percentage of the total population by age-group is as follows: Age-Group in years Percentage15 years or less 30 16-25 17.75 26-25 17.25 36-45 14.50 46-55 14.25 56-65 5.12 66 and above 1.13 If 200 million people were below 36 years in age, approximately how many million will be in the age group 56 – 65 ?

The correct answer is (a) 12.75 million.

The total population is 100%. The percentage of people below 36 years of age is 30%. Therefore, the percentage of people above 36 years of age is 70%. The percentage of people in the age group 56-65 is 5.12%. Therefore, the number of people in the age group 56-65 is 5.12% of the total population, which is 5.12% * 100 million = 5.12 million. Since the total population is rounded to the nearest million, the number of people in the age group 56-65 is also rounded to the nearest million, which is 12.75 million.

Option (b) is incorrect because it is the percentage of people in the age group 36-45. Option (c) is incorrect because it is the percentage of people in the age group 46-55. Option (d) is incorrect because it is not a specific number.