Question

lf n (A)=8,n(Ab),=14,n(Ab)=4,find n (b)​

Answer 1

Answer:

n(A)= 8 , n(A U B) = 14 , n(A n B)=4

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

14 = 8 + n(B) -4

14-8+4 = n(B)

6 +4 = n(B)

10 = n(B)

n(B) = 10