Question

Multiple choice question : 

If f : A → B is a bijective function and if n(B) = 7, then n(A) is equal to

पर्याय

• 7

• 49

• 1

• 14

Answer 1

 7

Explanation;

Hint:

In a bijective function, n(A) = n(B)

⇒ n(A) = 7