GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 23 Oct 2018, 16:08

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

### Show Tags

11 Mar 2018, 21:02
00:00

Difficulty:

25% (medium)

Question Stats:

93% (01:02) correct 7% (00:42) wrong based on 39 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: 781 Location: India GMAT 1: 710 Q49 V36 Re: At a bakery, chocolate chip cookies sell for$2.00 and oatmeal raisin  [#permalink]

### Show Tags

12 Mar 2018, 00:18
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
Posts: 3207
Location: India
GPA: 3.12
At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 12 Mar 2018, 00:40 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!
_________________

You've got what it takes, but it will take everything you've got

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4110
Location: India
GPA: 3.5
Re: At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 12 Mar 2018, 11:38 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)
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

PS Forum Moderator
Joined: 16 Sep 2016
Posts: 314
GMAT 1: 740 Q50 V40
Re: At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 12 Mar 2018, 12:53 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.
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 3906
Location: United States (CA)
Re: At a bakery, chocolate chip cookies sell for $2.00 and oatmeal raisin [#permalink] ### Show Tags 13 Mar 2018, 17:03 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

_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions