Question

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

Answer 1

Answer:

n(B) = 21

Step-by-step explanation:

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

15 + n(B) = 29 + 7

15 + n(B) = 36

n(B) = 36-15

n(B)= 21