In an examination, 25% of total students failed in Hindi, 50% failed in English and 25% in both. The percentage of these who passed in both the subjects is :	Choices:
A) 23 B) 37 C) 28 D) 40 E) 50
Explanation:   Formula n(aâˆªb) = n(a) + n(b) âˆ’ n(aâˆ©b)   Fail in Hindi or English = 25 + 50 â€“ 25 = 50   Therefore students who passed = 100 â€“ 50 = 50.   Answer: 50
<result>E</result>
In an examination, 25% of total students failed in Hindi, 50% failed in English and 25% in both. The percentage of these who passed in both the subjects is :