Question

If n(A)=15, n(AUB) =29,n(AUB)=7then n(B) =?

Answer 1

Hey

Here is your answer,

Given that,

n(A)=15
n(AUB) =29
n(A intersection B)=7
n(B) = ?

By using the formula ,

n(AUB) = n (A) + n(B) - n( A intersection B)
n(B) = 29+7-15
= 36-15
= 21

Hope it helps you!

Answer 2

HEY mate there are two union out of which one of it I have as intersection.

if other one is intersection then you can follow the same steps to get your answer.

hope it helps you