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anjali agarwal Grade: 12

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

do specify the explanation......

7 years ago

Answers : (1)

Askiitians Expert Sahil Arora - IITD
19 Points

 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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Askiitians Experts

Sahil Arora
7 years ago
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