Answers

2015-09-24T19:33:48+05:30
Failed in one subject(A) = 35%
failed in another subject(B) = 42%
failed in both subjects(A Π B) = 15%

Total failed(A U B) = A + B - A Π B = 35 + 42 - 15 = 62%
Total Passed candidates = 100 - 62 = 38%
Total passed candidates = 551
So 38% of total candidates = 551
total candidates = 551×100 / 38 = 1450

1450 students had appeared in the examination.
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