Mary baked strawberry, durian and mocca cookies. There were one-third as many mocca cookies as durian cookies and an equal number of mocca cookies as strawberry cookies. The cost of each cookie is given as shown.
1 mocca cookie: $1.60
1 durian cookie: $1.60
1 strawberry cookie: $1.60
If she collected $168 from selling all the cookies, how many durian cookies were there?
|
Mocca |
Durian |
Strawberry |
Ratio of cookies |
1 u |
3 u |
1 u |
Cost of 1 cookies |
$1.60 |
$1.60 |
$1.60 |
Total Value |
1.6 u |
4.8 u |
1.6 u |
Mocca cookies : Durian cookies : Strawberry cookies
1 : 3 : 1
Total amount earned from selling all the cookies
= 1.6 u + 4.8 u + 1.6 u
= 8 u
8 u = 168
1 u = 168 ÷ 8 = 21
Number of durian cookies
= 3 u
= 3 x 21
= 63
Answer(s): 63