Question

If n(A) = 18, n(B)= 20, n(A U B)= 25,then find n(A Ո B

Answer 1

Answer:

13

Step-by-step explanation:

n(A) + n(B) - n(A Ո B)=n(A U B)

n(A Ո B) = 38 -25 = 13

Answer 2

Answer:

solution

Step-by-step explanation:

n (A) - n(B) - n (AՈB) = n (AUB)

n (AՈB)= 38 - 25

= 13

hence , n (AՈB) = 13