Study the following table and answer the question below.

What is the ratio of the total number of male students to that of female students who opted for Biology in schools A and D together?

Correct option is D

Solution:

Number of male students who opted biology in school A = (900 × 30% × 7) / 15 = 126
Number of male students who opted biology in school D = (800 × 18% × 5) / 12 = 60
Number of female students who opted biology in school A = (900 × 30% × 8) / 15 = 144
Number of female students who opted biology in school D = (800 × 18% × 7) / 12 = 84
Male students who opted for biology in schools A and D : Female students who opted for biology in schools A and D
=> (126 + 60) : (144 + 84)
=> 186 : 228 = 31 : 38