A person has 7 friends. In how many ways he can call up to one or more friends
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Each of the 7 friends could be present or not present (2 cases) giving total of 2raised to the power7 scenarios.
Since at least one must be present we exclude the case that none of them is present. So the answer would be:
2 raised to the power 7−1=127.
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thank you
Since at least one must be present we exclude the case that none of them is present. So the answer would be:
2 raised to the power 7−1=127.
.
.
.
.
thank you
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