If a set A has m elements and the set B has n elements, then the number of injections from A to B is

1. ${}^{n}C_m$ if $n\ge m$
2. ${}^{n}P_m$ if $n\ge m$
3. $0$ if $n\ge m$
4. $m.{}^{n}C_m$ if $n\ge m$

Solution

Asked in: AP EAMCET 2022 (04 Jul Shift 2)

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