In an examination, `45%` of the candidates have passed in English, `40%` have passed in Bengali, while `30%` have passed in both the subjects. Find the total number of candidates if 90 of them have failed in both the subjects.

In.an examination. 50%of the condidates have passed in mathematics 50% have passed in physics, while 41% have passed in both the subjects. Find the total number of candidates if..41 of them have failed in both subjects. (By., using set theory).

In an examination 70% of the candidates passed in English. 80% passed in Mathematics. 10% failed in both the subjects. If 144 candidates pased in both, the total number of candidates was :

In an examination 70% of the candidates passed in English, 65% in Mathematics, 27 % failed in both the subjects and 248 candidates passed in both subjects. Find the total number of candidates.

In an examination 80% candidates passed in English and 85% candidates passed in Mathematics. If 73% candidates passed in both these subjects, then what per cent of candidates failed in both the subjects ?

In an examination, 50% of the candidates failed in English, 40% failed in Hindi and 15% failed in both the subjects. The percentage of candidates who passed in both English and Hindi is

In an examination 52% of the candidates failed in Science 42% in Mathematics and 17% in both. The no. of those who passed in both the subjects, is :

In an examination, 60% of the candidates passed in English and 70% of the candidates passed in Mathematics, but 20% failed in both of these subjects. If 2500 candidates passed in both the subjects, the number of candidates that appeared at the examination was