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प्रश्न
Multiple choice question :
If f : A → B is a bijective function and if n(B) = 7, then n(A) is equal to
विकल्प
7
49
1
14
उत्तर
7
Explanation;
Hint:
In a bijective function, n(A) = n(B)
⇒ n(A) = 7
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