Question

If A (5, 7, 8, 9), B = {3, 4, 5, 6} and C = {2, 4, 6, 8, 10); Find: n(AUB) + n(AB)
a)57
b)8
c)15
guys plz tell urgent!!​

Answer 1

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