MathematicsSetsJAMB
n(U) = 40, n(A) = 24 and n(B) = 18. Every element of U is in A or B. Find n(A ∩ B).
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Answer: A. 2
40 = 24 + 18 − n(A ∩ B), so n(A ∩ B) = 2.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.