Question

Multiple Choice Question :

If n(A × B) = 6 and A = {1, 3} then n(B) is ________

पर्याय

• 1

• 2

• 3

• 6

Answer 1

3

Explanation;

n(A × B) = 6

n(A) = 2

n(A × B) = n(A) × n(B)

6 = 2 × n(B)

n(B) = `6/2` = 3