Question

1) If n(A) = 15, n(A∪ ) = 29, n(A∩ ) = 7, then find n(B) by completing the following activity: n(A∪ ) = + n(B) - n(A∩ ) = + n(B) - 7 n(B) =​

Answer 1

ffftttffttffttt has left

Answer 2

Answer:

21

Step-by-step explanation:

We have,

n(A) = 15, n (A U B) = 29, n (A N B) = 7

Since, n (B) = n (A U B) + n (A N B) - n (A) = 29 + 7 - 15

So, n (B) = 21