Q.

The number of one one onto functions that can be defined from {1, 2, 3, 4) onto set B is 24 then n(B) =

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answer is 4.

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Detailed Solution

The number of bijections from A to B is n(A)!=24 ⇒k!=24=4!
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The number of one one onto functions that can be defined from {1, 2, 3, 4) onto set B is 24 then n(B) =