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

 It is currently 24 Aug 2016, 18:48

### 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

# Martha bought several pencils. If each pencil was either a

Author Message
Director
Joined: 10 Feb 2006
Posts: 657
Followers: 3

Kudos [?]: 363 [0], given: 0

Martha bought several pencils. If each pencil was either a [#permalink]

### Show Tags

27 Jun 2008, 19:31
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Martha bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencil did martha buy?

(1). Marth bought a total of 6 pencils
(2). The total value of the pencils Marth bought was 130 cents.

state 1
x + y = 6 - insufficient

.23(x) + .21(y) = 1.30 cents

We could very well choose C but the actual answer could be found just using plug in in B.

I choose B, wait for you to concur. Thanks
_________________

GMAT the final frontie!!!.

Senior Manager
Joined: 09 Oct 2007
Posts: 466
Followers: 1

Kudos [?]: 37 [0], given: 1

### Show Tags

27 Jun 2008, 23:01
I'd go for B as well:

From the stem: .23 (x) + .21 (__-x) = $___ Statement 1: .23 (x) + .21 (6-x) =$___
INSUFF

Statement 2:
Total numner of pencils must be 6, because 1.30/.21<7 and 1.30/.23>5
Therefore:
.23 (x) + .21 (6-x) = \$1.30

Martha bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencil did martha buy?

(1). Marth bought a total of 6 pencils
(2). The total value of the pencils Marth bought was 130 cents.
Director
Joined: 14 Aug 2007
Posts: 733
Followers: 9

Kudos [?]: 168 [0], given: 0

### Show Tags

27 Jun 2008, 23:32
Martha bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencil did martha buy?

(1). Marth bought a total of 6 pencils
(2). The total value of the pencils Marth bought was 130 cents.

state 1
x + y = 6 - insufficient

.23(x) + .21(y) = 1.30 cents

We could very well choose C but the actual answer could be found just using plug in in B.

I choose B, wait for you to concur. Thanks

I will go for C, we have 2 unknowns so need to different equations
Intern
Joined: 27 May 2008
Posts: 11
Followers: 0

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

### Show Tags

28 Jun 2008, 03:17
Martha bought several pencils. If each pencil was either a 23-cent pencil or a 21-cent pencil, how many 23-cent pencil did martha buy?

(1). Marth bought a total of 6 pencils
(2). The total value of the pencils Marth bought was 130 cents.

*********
Statement 1 - x+y =6 is insufficient.

*********
Statement 2 -

0.23(x) + 0.21(y) = 1.30 cents

0.23x+0.21(6-x)=1.3

0.23+1.26-0.21x = 1.3

0.02x +1.26 = 1.3

0.02x =0.04

x = 0.04/0.02 = 2

Then test the original equation:
0.23 * 2 +0.21(y)=1.3

0.46 + 0.21 y = 1.3

0.21y = 1.3-0.46

0.21 y = 0.84

y = 4

This makes x+ y as six with worth 1.3 cents, which makes the the as perfect answer.
Re: Pencils   [#permalink] 28 Jun 2008, 03:17
Display posts from previous: Sort by