Question

3 points
If n(A)=5,n(B)=7 and n(A n B)=3 find n(AUB)

Answer 1

Answer:

I hope it helps you

Step-by-step 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