Question 906810
If all 50 tickets were adult tickets, the revenue would be 6.5 * 50, or $325
The actual revenue is 250.  325-250 = $75
The difference between and adult and child ticket is 6.5-4, or $2.50
75/2.5 = 30
30 children's tickets were sold for a total of 30*4, or $120
That leaves 20 tickets sold to adults at $6.50.  20*6.5=$130
$120 + $130 = $250