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There are 100 students in 3 sections A B...

There are 100 students in 3 sections A B and C of a class. The average marks of all the 3 sections was 84. The average of B and C was 87.5 and the average marks of A is 70. The number of students in A was:

A

30

B

35

C

20

D

25

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The correct Answer is:
C
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