Question

35% candidates failed in one subject and 42% failed in another subject while 15% failed in both the subject is 2500 candidate appeared at the exam how many passed in either subject but not in both

Answer 1

actual candidate=2500

paper1 failed student = 35

paper2 failed student = 42

student failed on both = 15


assume no of candidate = 100

paper 1 passed student = 100-35=>65

paper 2 passed student = 100-42=58

students failed in paper1 only=35-15=20

students failed in paper2 only=42-15=27

candidate failed both paper=20+27+15=62

candidate Passed both paper=100-62=38

candidate Passed in paper1 only = 65-38=27

candidate failed both paper=20+27+15=62

candidate Passed both paper=100-62=38

candidate Passed in paper1 only = 65-38=27

candidate Passed in paper2 only=58-38=20

either passed in paper1 & 2 = 27+20 =47

but actual student = 2500 in question

so 2500 *47/100 =1175

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