The ratio of the number of scones to the number of croissants in a supermarket is 6 : 1. A scone costs $1.80 and a croissant costs $0.70. If all the scones and croissants are sold, a sum of $115 will be collected. How many scones are there altogether?
| |
Scones |
Croissants |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.80 |
$0.70 |
|
| Total value |
10.8 u |
0.7 u |
$115 |
Amount collected if all the scones are sold
= 6 u x 1.8
= 10.8 u
Amount collected if all the croissants are sold
= 1 u x 0.7 u
= 0.7 u
Amount collected if all the scones and croissants are sold
= 10.8 u + 0.7 u
= 11.5 u
11.5 u = 115
1 u = 115 ÷ 11.5 = 10
Total number of scones
= 6 u
= 6 x 10
= 60
Answer(s): 60
