Question

in an examination 35% candidates failed in a subject and 42% candidates failed in another subject and 15% failed in both the subjects. If 2500 candidates appeared in the examination,how many passed in either subject but not in both?

Answer 1

this should solve as per sets. if he failed either one subject, then automatically he will pass either subject.so,42%+35%-2*15%=47%then, 47% failed either subject automatically they passed either subject. means the candidates have passed either subject not both subject is 47% of 2500 = 1175