Gwen baked banana, durian and mocca biscuits. There were one-quarter as many mocca biscuits as durian biscuits and an equal number of mocca biscuits as banana biscuits. The cost of each biscuit is given as shown.
1 mocca biscuit: $1.50
1 durian biscuit: $1.60
1 banana biscuit: $1.10
If she collected $180 from selling all the biscuits, how many durian biscuits were there?
|
Mocca |
Durian |
Banana |
Ratio of biscuits |
1 u |
4 u |
1 u |
Cost of 1 biscuits |
$1.50 |
$1.60 |
$1.10 |
Total Value |
1.5 u |
6.4 u |
1.1 u |
Mocca biscuits : Durian biscuits : Banana biscuits
1 : 4 : 1
Total amount earned from selling all the biscuits
= 1.5 u + 6.4 u + 1.1 u
= 9 u
9 u = 180
1 u = 180 ÷ 9 = 20
Number of durian biscuits
= 4 u
= 4 x 20
= 80
Answer(s): 80