Question

n(A) =15, n(Aunion B) =29,n(A intersection B) =7,then find n(B)

Answer 1

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

soln:
N(AUB)=N(A)+N(B)-N(A INTERSECTION B)
29=15+x-7
x=29-8
x=21
n(B)=21

Answer 2

Answer:

Step-by-step explanation:

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

29 = 15 + n(B) - 7

29 = 8 + n(B)

29 - 8 = n(B)

n(B) = 21

This is ur ans.

Hope it helps!