Question

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

Answer 1

1. By Phone Call

2. By Video Call

3. By Letter

4. By Email

5. By SMS

6. By WhatsApp

7. By invitation card

Answer 2

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Each of the 7 friends could be present or not present (2 cases) at the party giving total of Each of the 7 friends could be present or not present (2 cases) at the party giving total of 2⁷ scenarios.

Since at least one must be present we exclude the case that none of them is present. So the answer would be:

2⁷−1= 127.

Therefore, Answer is 127.

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