Let x = number that sell for $18 each
Then, 200 - x = number that sell for $33 each
18x + 33(200 - x) = 4800
18x + 6600 - 33x = 4800
-15x = -1800
x = 120
There were 120 racquets selling for $18 each and 80 racquets selling for $33 each.