Question

2) If n(A)=5,n(A cup B)=9 n(A cap B)=2 then find n(B) .

9 = 5 + n(B) - 2

9 = Box+n(B)

n(B)=9- Box

n(B) =

Solution: n(A cup B)=n(A)+n(B)- Box

Answer 1

Step-by-step explanation:

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

=> 9 = 5 + n(B) - 2

=> n(B) = 6