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What is the number of proper subsets of ...

What is the number of proper subsets of a given finite set with n elements?

A

`2n-1`

B

`2n-2`

C

`2^(n)-1`

D

`2^(n)-2`

Text Solution

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The correct Answer is:
C
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  18. If A cap B = A cup B then what can we conclude ?

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