Question

The average marks of the students in four sections A, B, C, and D together is 60%. The average marks of the students of A, B, C and D individually are 45%, 50%, 72% and 80% respectively. If the average marks of the students of sections A and B together is 48% and that of the students of B and C together is 60%. What is the ratio of number of students in sections A and D?

• A. 2:3
• B. 4:3
• C. 5:3
• D. 3:5

Answer 1

The correct option is B 4:3

Since the average marks of sections B and C together are equal to the average marks of all the four sections (i.e., A,B,C and D), therefore the average marks of the remaining two sections A and D together will also be equal i.e., 60%

$\Rightarrow$ Hence, the required ratio is 4:3.