The ratio of the number of macarons to the number of wafers in a kiosk is 2 : 1. A macaron costs $1.20 and a wafer costs $0.40. If all the macarons and wafers are sold, a sum of $28 will be collected. How many macarons are there altogether?
|
Macarons |
Wafers |
Total |
Number |
2 u |
1 u |
|
Value |
$1.20 |
$0.40 |
|
Total value |
2.4 u |
0.4 u |
$28 |
Amount collected if all the macarons are sold
= 2 u x 1.2
= 2.4 u
Amount collected if all the wafers are sold
= 1 u x 0.4 u
= 0.4 u
Amount collected if all the macarons and wafers are sold
= 2.4 u + 0.4 u
= 2.8 u
2.8 u = 28
1 u = 28 ÷ 2.8 = 10
Total number of macarons
= 2 u
= 2 x 10
= 20
Answer(s): 20