The ratio of the number of croissants to the number of scones in a shop is 3 : 1. A croissant costs $1.20 and a scone costs $0.80. If all the croissants and scones are sold, a sum of $132 will be collected. How many croissants are there altogether?
| |
Croissants |
Scones |
Total |
| Number |
3 u |
1 u |
|
| Value |
$1.20 |
$0.80 |
|
| Total value |
3.6 u |
0.8 u |
$132 |
Amount collected if all the croissants are sold
= 3 u x 1.2
= 3.6 u
Amount collected if all the scones are sold
= 1 u x 0.8 u
= 0.8 u
Amount collected if all the croissants and scones are sold
= 3.6 u + 0.8 u
= 4.4 u
4.4 u = 132
1 u = 132 ÷ 4.4 = 30
Total number of croissants
= 3 u
= 3 x 30
= 90
Answer(s): 90
