Question

If n(A)=12,n(B)=8andn(A intersection B)=5 then n(A union B)=? A)20. B)15. C)10. D)5. ​

Answer 1

Answer:

Given n(A) =12,n(B)=8,n(Aintersection B) =5

The formula of

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

n(AUB) =12+8-5

n(AUB)=15

Answer 2

Answer:

B

Step-by-step explanation:

n(A¹) +n(B¹) +n(A interestion B)