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In an examination 75% of the students passed in mathematics, 45% passed in general science and 30% passed in both subject. What per cent of the students have failed in both subject?

In an examination 75% of the students passed in mathematics, 45% passed in general science and 30% passed in both subject. What per cent of the students have failed in both subject? Correct Answer 10

Percentage of pass in total = Percentage of pass in Bangla + Percentage of pass in English - Percentage of pass in both = 75 + 45 - 30 = 90 So, percentage of fail = 100 - 90 = 10

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