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### Show Tags

11 Mar 2018, 20:02
00:00

Difficulty:

15% (low)

Question Stats:

93% (01:01) correct 8% (00:50) wrong based on 50 sessions

### HideShow timer Statistics

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 _________________ BSchool Forum Moderator Joined: 07 Jan 2016 Posts: 872 Location: India GMAT 1: 710 Q49 V36 Re: At a bakery, chocolate chip cookies sell for$2.00 and oatmeal raisin  [#permalink]

### Show Tags

11 Mar 2018, 23:18
Bunuel wrote:
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. $2.00 total cookies bought = 30 cc cookie = 2 i.e 2x18 = 36$
om cookie = 1 1x12 = 12

total = 48

avg = 48/30 = 1.6
Senior PS Moderator
Joined: 26 Feb 2016
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Location: India
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At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 11 Mar 2018, 23:40 Bunuel wrote: 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

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!
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Re: At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 12 Mar 2018, 10:38 1 Bunuel wrote: 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

$$\frac{2*18 + 1*12}{18 + 12}$$

= $$1.60$$, Answer will be (D)
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Status: It always seems impossible until it's done.
Joined: 16 Sep 2016
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Re: At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 12 Mar 2018, 11:53 pushpitkc wrote: Bunuel wrote: 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

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!

take the weighted average of the two prices to find the average price of cookie!

Nice solution. +1 Kudos to you sir.
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Re: At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 13 Mar 2018, 16:03 Bunuel wrote: 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

We can create the following equation:

[2(18) + 12]/30 = 48/30 = 8/5 = 1.60

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