The ratio of the number of wafers to the number of cupcakes in a supermarket is 5 : 1. A wafer costs $1.80 and a cupcake costs $0.60. If all the wafers and cupcakes are sold, a sum of $192 will be collected. How many wafers are there altogether?
| |
Wafers |
Cupcakes |
Total |
| Number |
5 u |
1 u |
|
| Value |
$1.80 |
$0.60 |
|
| Total value |
9 u |
0.6 u |
$192 |
Amount collected if all the wafers are sold
= 5 u x 1.8
= 9 u
Amount collected if all the cupcakes are sold
= 1 u x 0.6 u
= 0.6 u
Amount collected if all the wafers and cupcakes are sold
= 9 u + 0.6 u
= 9.6 u
9.6 u = 192
1 u = 192 ÷ 9.6 = 20
Total number of wafers
= 5 u
= 5 x 20
= 100
Answer(s): 100
