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11 Mar 2018, 21:02
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D
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92% (01:03) correct
8%
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At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin cookies sell for $1.00. If Paul buys 18 chocolate chip cookies and 12 oatmeal raisin cookies, what is the average price he pays per cookie?
A. $1.20
B. $1.40
C. $1.50
D. $1.60
E. $2.00
A. $1.20
B. $1.40
C. $1.50
D. $1.60
E. $2.00
12 Mar 2018, 00:18
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Bunuel
total cookies bought = 30
cc cookie = 2 i.e 2x18 = 36$
om cookie = 1 1x12 = 12
total = 48
avg = 48/30 = 1.6
12 Mar 2018, 00:40
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Bunuel
Since the proportion of chocolate chip cookies to oatmeal raisin cookies is 3:2,
we can calculate the average price for a cookie to be \(\frac{3*2 + 2*1.5}{5} = \frac{5 + 3}{5} = $1.6\)(Option D)
P.S This concept of bringing down the numbers to proportions can be really useful
when the numbers are bigger!
