Mohan has 8 friends, in how many ways he invite one or more of them to dinner?

Explanation

To solve the problem of how many ways Mohan can invite one or more of his 8 friends to dinner, we can use the concept of combinations.

### Step-by-Step Solution:

1. **Understanding the Problem**: Mohan has 8 friends, and he can invite any combination of them, but he must invite at least one friend.

2. **Total Combinations**: For each friend, Mohan has two choices: either to invite the friend or not to invite the friend. Therefore, for 8 friends, the total number of combinations can be calculated as:
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