The ratio of the number of puffs to the number of macarons in a supermarket is 5 : 1. A puff costs $1.90 and a macaron costs $0.40. If all the puffs and macarons are sold, a sum of $99 will be collected. How many puffs are there altogether?
| |
Puffs |
Macarons |
Total |
| Number |
5 u |
1 u |
|
| Value |
$1.90 |
$0.40 |
|
| Total value |
9.5 u |
0.4 u |
$99 |
Amount collected if all the puffs are sold
= 5 u x 1.9
= 9.5 u
Amount collected if all the macarons are sold
= 1 u x 0.4 u
= 0.4 u
Amount collected if all the puffs and macarons are sold
= 9.5 u + 0.4 u
= 9.9 u
9.9 u = 99
1 u = 99 ÷ 9.9 = 10
Total number of puffs
= 5 u
= 5 x 10
= 50
Answer(s): 50
