Question

17. In an examination, questions were given from 5 topics. Out of
the appearing students, 10% passed in all topics while 10% did
not pass in any. Of the remaining, 20%passed in one topic only
and 25% in two topics only. If 24% of the total students passed 4
topics only and 500 students passed in 3 topics only, find the
total number of students who appeared in the examination?​

Answer 1

Let the number of appearing students be 100.

Pass only in 0 topic – 10

1 – 16 (20% of 80)

2 – 20 (25% of 80)

3 – 20% (100 – (16+20+24+20))

4 – 24%

5 – 20%

Therefore, 20% of x = 500 => x = 2500

The question is " If 24% of the total students passed 4 topics only and 500 students passed in 3 topics only, find the total number of students who appeared in the examination?"

The total number of students is 2500.

Hence, the answer is 2500

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