In an examination, 34% of the students failed in Mathematics and 42% faiied in English. If 20% of the students failed in both the subjects, then the percentage of students who passed in both the subjects was :
Correct Answer: 44 %
Explanation:
n (A) = 34, n (B) = 42, n (A ∩ B) = 20.
So, n (A U B) = n (A) + n(B) - n(A∩B) = 34 + 42 - 20 = 56.
Percentage failed in either or both the subjects = 56.
