The ratio of the number of croissants to the number of cookies in a supermarket is 6 : 1. A croissant costs $1.10 and a cookie costs $0.80. If all the croissants and cookies are sold, a sum of $148 will be collected. How many croissants are there altogether?
| |
Croissants |
Cookies |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.10 |
$0.80 |
|
| Total value |
6.6 u |
0.8 u |
$148 |
Amount collected if all the croissants are sold
= 6 u x 1.1
= 6.6 u
Amount collected if all the cookies are sold
= 1 u x 0.8 u
= 0.8 u
Amount collected if all the croissants and cookies are sold
= 6.6 u + 0.8 u
= 7.4 u
7.4 u = 148
1 u = 148 ÷ 7.4 = 20
Total number of croissants
= 6 u
= 6 x 20
= 120
Answer(s): 120
