The ratio of the number of cupcakes to the number of cookies in a stall is 4 : 1. A cupcake costs $1.20 and a cookie costs $0.40. If all the cupcakes and cookies are sold, a sum of $104 will be collected. How many cupcakes are there altogether?
| |
Cupcakes |
Cookies |
Total |
| Number |
4 u |
1 u |
|
| Value |
$1.20 |
$0.40 |
|
| Total value |
4.8 u |
0.4 u |
$104 |
Amount collected if all the cupcakes are sold
= 4 u x 1.2
= 4.8 u
Amount collected if all the cookies are sold
= 1 u x 0.4 u
= 0.4 u
Amount collected if all the cupcakes and cookies are sold
= 4.8 u + 0.4 u
= 5.2 u
5.2 u = 104
1 u = 104 ÷ 5.2 = 20
Total number of cupcakes
= 4 u
= 4 x 20
= 80
Answer(s): 80
