Question

If n (aub)-70,n(anb)-27,n(b)-52then n(a)-?

Answer 1

$\huge\boxed{\displaystyle \rm {Answer:}}$

n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

Given n(A)=7

n(B)=9

n(A∪B)=14

Substituting in 1

14=7+9−n(A∩B)

⇒n(A∩B)=16−14=2

Answer 2

Step-by-step explanation:

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