Tiffany baked blueberry, durian and mocca cookies. There were half as many mocca cookies as durian cookies and an equal number of mocca cookies as blueberry cookies. The cost of each cookie is given as shown.
1 mocca cookie: $1.20
1 durian cookie: $1.20
1 blueberry cookie: $1.50
If she collected $255 from selling all the cookies, how many durian cookies were there?
|
Mocca |
Durian |
Blueberry |
Ratio of cookies |
1 u |
2 u |
1 u |
Cost of 1 cookies |
$1.20 |
$1.20 |
$1.50 |
Total Value |
1.2 u |
2.4 u |
1.5 u |
Mocca cookies : Durian cookies : Blueberry cookies
1 : 2 : 1
Total amount earned from selling all the cookies
= 1.2 u + 2.4 u + 1.5 u
= 5.1 u
5.1 u = 255
1 u = 255 ÷ 5.1 = 50
Number of durian cookies
= 2 u
= 2 x 50
= 100
Answer(s): 100