Some visitors paid a total of $608 for entrance tickets to a theme park. The entrance ticket for a child cost $4. The entrance ticket for an adult cost 3 times as much. If there were 20 more adults than children, how many of the visitors were
- children?
- adults?
|
Adults |
Children |
Total |
Number |
1 u + 20 |
1 u |
|
Value |
$12 |
$4 |
|
Total value |
12 u + 240 |
4 u |
$608 |
(a)
Cost of an adult ticket
= 3 x 4
= $12
Cost of all the adult tickets
= 12(1 u + 20)
= 12 u + 240
Total cost of the tickets
= 12 u + 240 + 4 u
= 16 u + 240
16 u + 240 = 608
16 u = 608 - 240
16 u = 368
1 u = 368 ÷ 16 = 23
Total number of children
= 1 u
= 23
(b)
Total number of adults
= 1 u + 20
= 23 + 20
= 43
Answer(s): (a) 23; (b) 43