Question

In an examination, 65% students passed in
civics and 60% in history, 40% passed in both of
these subjects. If 90 students failed in history
and civics both, then what is the total number of
students?
(a) 600 (b) 650 (c)700 (d)750
​

Answer 1

600

Explanation:

civics-65

history-60

Total-125

both passed-40

125-40=85

failed in both= 100-85=15

which is 90

total students= 90/15×100 =600