Question

If n(A) = 16. n( B) = 19 and n(AB) = 30. Find n(AB)

Answer 1

309

Explanation:

We have ,

• n(A) = 16
• n(B) = 19

We know that the number of elements in Cartesian product of two sets is ,

• n(AB) = n(A) * n(B)
• n(AB) = 16 * 19
• n(AB) = 309