Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 27 Jul 2015, 22:08

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Yesterday Diana spent a total of 240 minutes attending a

Author Message
TAGS:
Intern
Joined: 22 Jun 2010
Posts: 43
Followers: 0

Kudos [?]: 39 [0], given: 1

Yesterday Diana spent a total of 240 minutes attending a [#permalink]  07 Sep 2010, 14:37
1
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

68% (02:25) correct 32% (01:23) wrong based on 89 sessions
Yesterday Diana spent a total of 240 minutes attending a training class, responding to E-mails, and talking on the phone. If she did no two of these three activities at the same time, how much time did she spend talking on the phone?

(1) Yesterday the amount of time that Diana spent attending the training class was 90 percent of the amount of time that she spent responding to E-mails.
(2) Yesterday the amount of time that Diana spent attending the training class was 60 percent of the total amount of time that she spent responding to E-mails and talking on the phone.
[Reveal] Spoiler: OA
Math Expert
Joined: 02 Sep 2009
Posts: 28717
Followers: 4572

Kudos [?]: 47128 [2] , given: 7104

Re: algebra [#permalink]  07 Sep 2010, 14:48
2
KUDOS
Expert's post
1
This post was
BOOKMARKED
mehdiov wrote:
Yesterday Diana spent a total of 240 minutes attending a training class, responding to E-
mails, and talking on the phone. If she did no two of these three activities at the same
time, how much time did she spend talking on the phone?
(1) Yesterday the amount of time that Diana spent attending the training class was
90 percent of the amount of time that she spent responding to E-mails.
(2) Yesterday the amount of time that Diana spent attending the training class was
60 percent of the total amount of time that she spent responding to E-mails and
talking on the phone.

Given: $$C+E+P=240$$, where C is th time she spent on training class, E is the time she spent on E-mail and P is the time she spent on phone. Question: $$P=?$$

(1) $$C=0.9E$$ --> $$C+E+P=0.9E+E+P=1.9E+P=240$$. Not sufficient to calculate $$P$$ (one equation, two variables).

(2) $$C=0.6(E+P)$$ --> $$C+E+P=0.6(E+P)+E+P=1.6E+1.6P=240$$. Not sufficient to calculate $$P$$ (one equation, two variables).

(1)+(2) $$1.9E+P=240$$ and $$1.6E+1.6P=240$$ --> we have two distinct linear equations with two variables hence we can calculate each of them. Sufficient.

_________________
Intern
Joined: 01 Jul 2013
Posts: 19
Schools: LBS MIF '15
Followers: 0

Kudos [?]: 38 [0], given: 16

Re: algebra [#permalink]  22 Oct 2013, 06:02
Bunuel wrote:
mehdiov wrote:
Yesterday Diana spent a total of 240 minutes attending a training class, responding to E-
mails, and talking on the phone. If she did no two of these three activities at the same
time, how much time did she spend talking on the phone?
(1) Yesterday the amount of time that Diana spent attending the training class was
90 percent of the amount of time that she spent responding to E-mails.
(2) Yesterday the amount of time that Diana spent attending the training class was
60 percent of the total amount of time that she spent responding to E-mails and
talking on the phone.

Given: $$C+E+P=240$$, where C is th time she spent on training class, E is the time she spent on E-mail and P is the time she spent on phone. Question: $$P=?$$

(1) $$C=0.9E$$ --> $$C+E+P=0.9E+E+P=1.9E+P=240$$. Not sufficient to calculate $$P$$ (one equation, two variables).

(2) $$C=0.6(E+P)$$ --> $$C+E+P=0.6(E+P)+E+P=1.6E+1.6P=240$$. Not sufficient to calculate $$P$$ (one equation, two variables).

(1)+(2) $$1.9E+P=240$$ and $$1.6E+1.6P=240$$ --> we have two distinct linear equations with two variables hence we can calculate each of them. Sufficient.

Bunuel, for statement 2 we can rearrange to get E+P=240/1.6. If we have E+P, cant we plug this into C+E+P=240, which gives us C+(240/1.6)=240, which gives us C=240-(240/1.6)? Hence 2 would be sufficient as you rearrange to get P?
Math Expert
Joined: 02 Sep 2009
Posts: 28717
Followers: 4572

Kudos [?]: 47128 [0], given: 7104

Re: algebra [#permalink]  22 Oct 2013, 06:56
Expert's post
bulletpoint wrote:
Bunuel wrote:
mehdiov wrote:
Yesterday Diana spent a total of 240 minutes attending a training class, responding to E-
mails, and talking on the phone. If she did no two of these three activities at the same
time, how much time did she spend talking on the phone?
(1) Yesterday the amount of time that Diana spent attending the training class was
90 percent of the amount of time that she spent responding to E-mails.
(2) Yesterday the amount of time that Diana spent attending the training class was
60 percent of the total amount of time that she spent responding to E-mails and
talking on the phone.

Given: $$C+E+P=240$$, where C is th time she spent on training class, E is the time she spent on E-mail and P is the time she spent on phone. Question: $$P=?$$

(1) $$C=0.9E$$ --> $$C+E+P=0.9E+E+P=1.9E+P=240$$. Not sufficient to calculate $$P$$ (one equation, two variables).

(2) $$C=0.6(E+P)$$ --> $$C+E+P=0.6(E+P)+E+P=1.6E+1.6P=240$$. Not sufficient to calculate $$P$$ (one equation, two variables).

(1)+(2) $$1.9E+P=240$$ and $$1.6E+1.6P=240$$ --> we have two distinct linear equations with two variables hence we can calculate each of them. Sufficient.

Bunuel, for statement 2 we can rearrange to get E+P=240/1.6. If we have E+P, cant we plug this into C+E+P=240, which gives us C+(240/1.6)=240, which gives us C=240-(240/1.6)? Hence 2 would be sufficient as you rearrange to get P?

_________________
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 5661
Followers: 319

Kudos [?]: 61 [0], given: 0

Re: Yesterday Diana spent a total of 240 minutes attending a [#permalink]  04 Dec 2014, 22:51
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Yesterday Diana spent a total of 240 minutes attending a   [#permalink] 04 Dec 2014, 22:51
Similar topics Replies Last post
Similar
Topics:
11 30 people in total attended an office party for a 11 15 Jul 2014, 22:42
5 At the bakery Lew spent a total of 6$for one kind of 4 15 Apr 2012, 21:29 3 Last year, if Arturo spent a total of$12,000 on his mortgage payments 9 23 Mar 2011, 06:24
At the bakery , Lew spent a total of $6.00 for one kind of 4 16 May 2010, 05:12 At the bakery, Lew spent a total of$6.00 for one kind of 4 07 Apr 2009, 09:57
Display posts from previous: Sort by