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Properties of Iota

Out of 6 book...

Question

Out of 6 books, in how many ways can a set of one or more books be chosen

A

64

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B

63

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C

62

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D

65

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Solution

The correct option is B 63
Required number of ways
$=^{6} C_{1} +^{6} C_{2} +^{6} C_{3} +^{6} C_{4} +^{6} C_{5} +^{6} C_{6} = 2^{6} - 1 = 63$

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