Question

11) If n(A) = 7, n(B) = 9 and n(AUB)= 14, then find the
value n(An B)​

Answer 1

Answer:

2

Explanation:

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

Hope this helps