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let n(A)=4 and n(B)=6.then the number of one-one functions from A to B is? do specify the explanation......

let n(A)=4 and n(B)=6.then the number of one-one functions from A to B is?


do specify the explanation......

Grade:12

1 Answers

Askiitians Expert Sahil Arora - IITD
19 Points
13 years ago

 Dear anjali

SInce no. of elements in A are 4 , for one-one functions only 4 elements from B can only be images of elements of A.

Now no. of one-one functions will be = no. of arrangements of 4 elements selected from B out of 6.

so answer is 6P4.

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Sahil Arora

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