The ratio of the number of scones to the number of cookies in a supermarket is 6 : 1. A scone costs $1.20 and a cookie costs $0.50. If all the scones and cookies are sold, a sum of $77 will be collected. How many scones are there altogether?
| |
Scones |
Cookies |
Total |
| Number |
6 u |
1 u |
|
| Value |
$1.20 |
$0.50 |
|
| Total value |
7.2 u |
0.5 u |
$77 |
Amount collected if all the scones are sold
= 6 u x 1.2
= 7.2 u
Amount collected if all the cookies are sold
= 1 u x 0.5 u
= 0.5 u
Amount collected if all the scones and cookies are sold
= 7.2 u + 0.5 u
= 7.7 u
7.7 u = 77
1 u = 77 ÷ 7.7 = 10
Total number of scones
= 6 u
= 6 x 10
= 60
Answer(s): 60
