MathematicsSetsWAEC
If n(A) = 15, n(B) = 12 and n(A ∩ B) = 5, find n(A ∪ B).
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Answer: B. 22
n(A ∪ B) = 15 + 12 − 5 = 22.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.
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