A man has 10 friends. In how many ways he can invite one or more of them to a party?
Explanation for the correct option:
Here, the number of friends
Number of ways of inviting one friend out of ten
Hence, the number of ways of inviting one or more friends …(1)
We know,
(2)
Now comparing the equations (1) and (2) we get,
Therefore, the man has ways of inviting his friends.
Hence, Option (D) is correct.