🤖 Ai回答: To solve the problem, we need to determine the number of ping pong balls in the box、Let's break it down step by step.
1、Identify the total number of ping pong balls and the number of red ping pong balls:
The total number of ping pong balls is 120.
The number of red ping pong balls is 40.
2、Calculate the number of non-red ping pong balls:
Since the total number of ping pong balls is 120 and 40 of them are red, the number of non-red ping pong balls is:
\[
120 40 = 80
\]
3、Determine the number of white ping pong balls:
The problem states that the remaining ping pong balls are white、Therefore, the number of white ping pong balls is the same as the number of non-red ping pong balls, which is 80.
So, the number of white ping pong balls is \(\boxed{80}\).