The ratio of the number of croissants to the number of wafers in a supermarket is 6 : 1. A croissant costs $1.20 and a wafer costs $0.70. If all the croissants and wafers are sold, a sum of $79 will be collected. How many croissants are there altogether?
|
Croissants |
Wafers |
Total |
Number |
6 u |
1 u |
|
Value |
$1.20 |
$0.70 |
|
Total value |
7.2 u |
0.7 u |
$79 |
Amount collected if all the croissants are sold
= 6 u x 1.2
= 7.2 u
Amount collected if all the wafers are sold
= 1 u x 0.7 u
= 0.7 u
Amount collected if all the croissants and wafers are sold
= 7.2 u + 0.7 u
= 7.9 u
7.9 u = 79
1 u = 79 ÷ 7.9 = 10
Total number of croissants
= 6 u
= 6 x 10
= 60
Answer(s): 60