It is currently 22 Apr 2019, 00:53

### 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

# QOTD#27 Keri, Neill, and Rich use toilet paper in their apar

Author Message
TAGS:
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 106

Kudos [?]: 1820 [0], given: 397

QOTD#27 Keri, Neill, and Rich use toilet paper in their apar [#permalink]  14 May 2017, 05:15
Expert's post
00:00

Question Stats:

66% (02:06) correct 33% (00:00) wrong based on 3 sessions
Keri, Neill, and Rich use toilet paper in their apartment in a ratio of 3:2:2. Rich buys two cases of toilet paper online for everyone’s use at 28 rolls per case, an average of $3.50/roll and a$14 delivery charge. If they each contribute to the cost of the toilet paper in direct proportion to the amount they use, how much must Keri contribute?

Drill 1
Question: 7
Page: 337/338

[Reveal] Spoiler: OA
90

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 106

Kudos [?]: 1820 [0], given: 397

Re: QOTD#27 Keri, Neill, and Rich use toilet paper in their apar [#permalink]  04 Jun 2017, 14:52
Expert's post
Explanation

The three roommates spend a total of $210 on toilet paper. If you make your ratio box you will see that your ratio total is 7 and your actual total is 210, so your multiplier is 30. Keri therefore needs to contribute$90.00 to the cost of the toilet paper.
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Intern
Joined: 24 Jan 2019
Posts: 27
Followers: 0

Kudos [?]: 2 [0], given: 29

Re: QOTD#27 Keri, Neill, and Rich use toilet paper in their apar [#permalink]  10 Feb 2019, 07:28
sandy wrote:
Explanation

The three roommates spend a total of $210 on toilet paper. If you make your ratio box you will see that your ratio total is 7 and your actual total is 210, so your multiplier is 30. Keri therefore needs to contribute$90.00 to the cost of the toilet paper.

Hello,

Please can you elaborate more on how did we get 210 $and how did we know that the multiplier is 30? thanks Founder Joined: 18 Apr 2015 Posts: 6211 Followers: 99 Kudos [?]: 1199 [0], given: 5721 Re: QOTD#27 Keri, Neill, and Rich use toilet paper in their apar [#permalink] 10 Feb 2019, 07:37 Expert's post 1 case = 28 rolls 2 case = 56 rolls 56 rolls * 3.50$ = 96 $+ 14$ for the delivery = 210 $(quite expensive as toilet paper, I would say) The ratio is $$3:2:2 = 7 x$$ $$\frac{210}{7}= 30$$ We are looking for the first ratio 3x = 30*3= 90 Hope now is more clear to you. Regards _________________ Intern Joined: 24 Jan 2019 Posts: 27 Followers: 0 Kudos [?]: 2 [0], given: 29 Re: QOTD#27 Keri, Neill, and Rich use toilet paper in their apar [#permalink] 10 Feb 2019, 08:03 Carcass wrote: 1 case = 28 rolls 2 case = 56 rolls 56 rolls * 3.50$ = 96 $+ 14$ for the delivery = 210 \$

(quite expensive as toilet paper, I would say)

The ratio is $$3:2:2 = 7 x$$

$$\frac{210}{7}= 30$$

We are looking for the first ratio 3x = 30*3= 90

Hope now is more clear to you.

Regards

Yes its more clear now. Thank you for your explanation.
Re: QOTD#27 Keri, Neill, and Rich use toilet paper in their apar   [#permalink] 10 Feb 2019, 08:03
Display posts from previous: Sort by