Question

If n(A)=7, n(B)=13 and n(A∩B)=4, than n(A∪B)=?​

Answer 1

Answer:

n(A∪B)=16

Step-by-step explanation:

as we know

A∪B=A + B - A∩B

and n(A∪B)=n(A) + n(B) - n(A∩B)

=7+13-4=16

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