Find the cardinal number of the set.Given:n(A ? B ? C)= 165n(A ? B ? C)= 22n(A ? B)= 46n(A ? C)= 43n(B ? C)= 41n(A)= 111n(B)= 82n(C)= 80Find n(A' ? B ? C)

A. 18
B. 20
C. 21
D. 19

Answer: D

Mathematics

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