The ratio of the number of croissants to the number of shortbreads in a shop is 4 : 1. A croissant costs $1.20 and a shortbread costs $0.80. If all the croissants and shortbreads are sold, a sum of $168 will be collected. How many croissants are there altogether?
| |
Croissants |
Shortbreads |
Total |
| Number |
4 u |
1 u |
|
| Value |
$1.20 |
$0.80 |
|
| Total value |
4.8 u |
0.8 u |
$168 |
Amount collected if all the croissants are sold
= 4 u x 1.2
= 4.8 u
Amount collected if all the shortbreads are sold
= 1 u x 0.8 u
= 0.8 u
Amount collected if all the croissants and shortbreads are sold
= 4.8 u + 0.8 u
= 5.6 u
5.6 u = 168
1 u = 168 ÷ 5.6 = 30
Total number of croissants
= 4 u
= 4 x 30
= 120
Answer(s): 120
