Question

. If n(A×B) =15 and n(A) =3 then n(B) =

1 point

12

5

45

3
​

Answer 1

Answer:

Heya Pikachu ♥️

Step-by-step explanation:

✏️Given,

n(A × B) = 15

n(A) = 3

To find n(B)

If a set P has p elements and another set Q has q elements, then the number of elements in (P × Q) is pq, that is, n(P) × n(Q) = n(P × Q).

Thus,

n(A) × n(B) = n(A × B)

→ 3 × n(B) = 15

→ n(B) = 5

Hence, set B has 5 elements.

✒️ Hope it helps✌️☺️♥️...

✌️check out the previous answer too,I've answered it...