Nora baked durian, coffee and banana cookies. There were one-third as many banana cookies as coffee cookies and an equal number of banana cookies as durian cookies. The cost of each cookie is given as shown.
1 banana cookie: $1.60
1 coffee cookie: $1.70
1 durian cookie: $1.80
If she collected $238 from selling all the cookies, how many coffee cookies were there?
|
Banana |
Coffee |
Durian |
Ratio of cookies |
1 u |
3 u |
1 u |
Cost of 1 cookies |
$1.60 |
$1.70 |
$1.80 |
Total Value |
1.6 u |
5.1 u |
1.8 u |
Banana cookies : Coffee cookies : Durian cookies
1 : 3 : 1
Total amount earned from selling all the cookies
= 1.6 u + 5.1 u + 1.8 u
= 8.5 u
8.5 u = 238
1 u = 238 ÷ 8.5 = 28
Number of coffee cookies
= 3 u
= 3 x 28
= 84
Answer(s): 84