The ratio of the number of biscuits to the number of croissants in a kiosk is 4 : 1. A biscuit costs $1.70 and a croissant costs $0.80. If all the biscuits and croissants are sold, a sum of $152 will be collected. How many biscuits are there altogether?
| |
Biscuits |
Croissants |
Total |
| Number |
4 u |
1 u |
|
| Value |
$1.70 |
$0.80 |
|
| Total value |
6.8 u |
0.8 u |
$152 |
Amount collected if all the biscuits are sold
= 4 u x 1.7
= 6.8 u
Amount collected if all the croissants are sold
= 1 u x 0.8 u
= 0.8 u
Amount collected if all the biscuits and croissants are sold
= 6.8 u + 0.8 u
= 7.6 u
7.6 u = 152
1 u = 152 ÷ 7.6 = 20
Total number of biscuits
= 4 u
= 4 x 20
= 80
Answer(s): 80
