Answer:
20
Explanation:
To find out how many sets of ping pong balls Piper should buy, you can simply divide the total number of ping pong balls needed by the number of ping pong balls in each set.
Total number of ping pong balls needed: 320
Number of ping pong balls in each set: 16
To calculate the number of sets Piper should buy:
Number of sets = Total number of ping pong balls needed / Number of ping pong balls in each set
Number of sets = 320 / 16
Number of sets = 20