Lynn baked blueberry, strawberry and durian tarts. There were one-third as many durian tarts as strawberry tarts and an equal number of durian tarts as blueberry tarts. The cost of each tart is given as shown.
1 durian tart: $1.50
1 strawberry tart: $1.20
1 blueberry tart: $1.90
If she collected $231 from selling all the tarts, how many strawberry tarts were there?
|
Durian |
Strawberry |
Blueberry |
Ratio of tarts |
1 u |
3 u |
1 u |
Cost of 1 tarts |
$1.50 |
$1.20 |
$1.90 |
Total Value |
1.5 u |
3.6 u |
1.9 u |
Durian tarts : Strawberry tarts : Blueberry tarts
1 : 3 : 1
Total amount earned from selling all the tarts
= 1.5 u + 3.6 u + 1.9 u
= 7 u
7 u = 231
1 u = 231 ÷ 7 = 33
Number of strawberry tarts
= 3 u
= 3 x 33
= 99
Answer(s): 99