If n(A)=7. n (B)=13, and nA n B)=4, then find n (A u B ).solve

1.	If n(A)=7. n (B)=13, and nA n B)=4, then find n (A u B ).solve
Answer» Answer: 16 How did I get this answer FIRST of all? Formula for FINDING the answer is, n(AUB)= n(A)+n(B)-n(A INTERSECTION B) HENCE, n(AUB)=7+13-4 = 20-4 =16

Answer»

Answer:

How did I get this answer FIRST of all?

Formula for FINDING the answer is,

n(AUB)= n(A)+n(B)-n(A INTERSECTION B)

HENCE,

n(AUB)=7+13-4

= 20-4

=16

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If n(A)=7. n (B)=13, and nA n B)=4, then find n (A u B ).solve

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