The ratio of the number of croissants to the number of cupcakes in a stall is 6 : 1. A croissant costs $1.70 and a cupcake costs $0.90. If all the croissants and cupcakes are sold, a sum of $111 will be collected. How many croissants are there altogether?
| |
Croissants |
Cupcakes |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.70 |
$0.90 |
|
| Total value |
10.2 u |
0.9 u |
$111 |
Amount collected if all the croissants are sold
= 6 u x 1.7
= 10.2 u
Amount collected if all the cupcakes are sold
= 1 u x 0.9 u
= 0.9 u
Amount collected if all the croissants and cupcakes are sold
= 10.2 u + 0.9 u
= 11.1 u
11.1 u = 111
1 u = 111 ÷ 11.1 = 10
Total number of croissants
= 6 u
= 6 x 10
= 60
Answer(s): 60
