Find the total number of ways in which 20 balls can be put into 5 boxes so that first box contains just one ball.

Explanation

To solve the problem of finding the total number of ways to distribute 20 balls into 5 boxes with the condition that the first box contains exactly one ball, we can follow these steps:

### Step-by-Step Solution:

1. **Choose a Ball for the First Box:**
Since the first box must contain exactly one ball, we need to choose one ball from the 20 available balls. The number of ways to choose 1 ball from 20 is given by:
\[
\text{Ways to choose 1 ball} = 20
...