1.

If n ( A) = 20, n (B)=28 and n ( A,U,B)= 36 then n(A n B)=?​

Answer»

ong>Answer:

USING the FORMULA n(A∪B)=n(A)+n(B)−n(A∩B)

then, n(A∩B)=n(A)+n(B)−n(A∪B)

=20+28−36=48−36=12



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