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The number of injection that are possible from A to itself is 720, then n(A)=

The number of injection that are possible from A to itself is 720, then n(A)=

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SHAIK AASIF AHAMED
askIITians Faculty 74 Points
7 years ago
Hello student,
From the given data the number of injection that are possible from A to itself is 720.Hence npn=720
Hence n=6
So there are 6 elements in set A
Thanks and Regards
Shaik Aasif
askIITians faculty

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