A function f: A→B is one-one if:

CA Foundation · Quantitative Aptitude · MTP · September 2026
A function f: A→B is one-one if:
(A) A. Every element of B has a pre-image
(B) B. Distinct elements of A have distinct images
(C) C. Every element of A has two images
(D) D. None of these

Suggested Answer and Working Notes:

Correct Answer: Option (B)

B. Distinct elements of A have distinct images

Topics: Part-A: Business Mathematics

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