Further MathematicsSets, binary operations and logicWAEC
n(U) = 50, n(A) = 30, n(B) = 25 and n(A ∩ B) = 12. Find n(A′ ∩ B′).
Show answer
Answer: C. 7
n(A ∪ B) = 30 + 25 − 12 = 43, so n(A′ ∩ B′) = 50 − 43 = 7.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.