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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?
  1. 3:5
  2. 4:3
  3. 5:3
  4. 2:3


Solution

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%

Hence, the required ratio is 4:3.

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