A man has 7 friends. In how many ways he can invite one or more of the

1.	A man has 7 friends. In how many ways he can invite one or more of them for a tea party
A.	128
B.	256
C.	127
D.	130
Answer» D. 130

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A man has 7 friends. In how many ways he can invite one or more of them for a tea party

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