Question

if n (A) =20,n(AUB)=34,n(AnB)=12 then n(B)=​

Answer 1

Answer:

n(A∪B) = n(A) + n(B) - n(A⋂B)

n(B) = 26

Step-by-step explanation:

n(A∪B) = n(A) + n(B) - n(A⋂B)

34 = 20+ n(B) - 12

34 - 20 =  n(B) - 12

14 = n(B) - 12

14+12 = n(B)

26 = n(B)