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The number of surjections from A = {1, 2...

The number of surjections from A = {1, 2, …, n}, `n ge 2` onto B = {a, b} is

A

`""^(n)P_(2)`

B

`2^(n)-2`

C

`2^(n)-1`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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