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Proper Subset

The number of...

Question

The number of non-empty subsets of the set ${1, 2, 3, 4}$ is

A

15

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B

14

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C

16

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D

17

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Solution

The correct option is A
15

The number of non- empty subsets $= 2^{n} - 1$
$2^{4} - 1 = 16 - 1 = 15$ .

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