X and Y are two sets such that n(X) = 15, n(Y) = 12 and
MATHEMATICS
JAMB 2015
X and Y are two sets such that n(X) = 15, n(Y) = 12 and n{X ∩ Y} = 7. Find ∩{X ∪ Y}
- A. 21
- B. 225
- C. 15
- D. 20
Correct Answer: D. 20
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