The number of ways in which a man can invite one or more of his 8 friends to dinner is

28

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128

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240

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255

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Solution

The correct option is D $255$
Required number of ways is $2^{8} - 1 = 256 - 1 = 255$
Hence the answer is D.

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Sunil has 6 friends. In how many ways can he invite two or more of his friend for dinner?

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