A public pool open for the summer a total of 246 people came swimming over the first three days it was open on the first day 79 came to swim on the second day 104 people swim how many people swamon the third day

On the third day 63 people swam.

On the first two days a total of 183 people visited the pool 

The remaining number of people is the amount of people who swam on the third day.
246-183 is 63, so 63 people swam on the third day