Question Detail
Question
In a panel of 20 interviewers, 14 said A was suitable, 10 said B was suitable, and 4 said neither. How many said both A and B were suitable?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Total who chose at least one = 20 - 4 = 16. Using formula: A + B − both = 16 → 14 + 10 − x = 16 → x = 8.
Hint
Use n(A ∪ B) = n(A) + n(B) − n(A ∩ B).