Question

n(A)=8,n(AUB)=15,n(AnB)=2,n(B)=....​

Answer 1

Answer:

n(B) =5

Step-by-step explanation:

we know formula

n(AUB) = n(A) + n(B) + n(AnB)

Given

n(A)= 8, n(AUB)= 15, n(AnB) = 2, n(B) = ?

The value applies in formula

=> 15 = 8 + 2+ n(B)

=>15 = 10 + n(B)

=> n(B) = 15 - 10 = 5