Some visitors paid a total of $370 for entrance tickets to a theme park. The entrance ticket for a child cost $2. The entrance ticket for an adult cost 4 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 |
$8 |
$2 |
|
Total value |
8 u + 160 |
2 u |
$370 |
(a)
Cost of an adult ticket
= 4 x 2
= $8
Cost of all the adult tickets
= 8(1 u + 20)
= 8 u + 160
Total cost of the tickets
= 8 u + 160 + 2 u
= 10 u + 160
10 u + 160 = 370
10 u = 370 - 160
10 u = 210
1 u = 210 ÷ 10 = 21
Total number of children
= 1 u
= 21
(b)
Total number of adults
= 1 u + 20
= 21 + 20
= 41
Answer(s): (a) 21; (b) 41