In a class 75% passed in English, 60% in Mathematics and 25% failed in both the subjects. What is the percentage who passed in both subjects?
সমাধান
সঠিক উত্তর: Option A
আমরা জানি,
Total = n(A) + n(B) - Both + None
=> 100% = 75% + 60% - Both + 25%
=> 100% = 160% - Both
=> Both = 160% - 100%
=> Both = 60%