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If A= {1,2,3...,n} and B ={ a,b} Then...

If `A= {1,2,3...,n} ` and `B ={ a,b}` Then , the number of subjection from A into B is .........

A

`""^(n)P_2`

B

`2^(n)-2`

C

`2^(n)-1`

D

None of these

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D
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KUMAR PRAKASHAN-RELATIONS AND FUNCTIONS -Solutions of NCERT Exemplar Problems (Objective type Questions)
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