Find the number of ways in which five friends sit in seven vacant seats in a bus ?

Explanation

To find the number of ways in which five friends can sit in seven vacant seats in a bus, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the total number of seats and friends**:
We have 7 vacant seats and 5 friends.

2. **Choose seats for the friends**:
...