MathematicsSetsJAMB
If n(A ∪ B) = 30, n(A) = 18 and n(B) = 20, find n(A ∩ B).
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Answer: A. 8
30 = 18 + 20 − n(A ∩ B), so n(A ∩ B) = 8.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.
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