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

 It is currently 04 Jul 2015, 22:05

### 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

# Joanna bought only $0.15 stamps and$0.29 stamps. How many

Author Message
TAGS:
Manager
Joined: 14 Jan 2006
Posts: 95
Schools: HKUST
Followers: 1

Kudos [?]: 28 [0], given: 0

Joanna bought only $0.15 stamps and$0.29 stamps. How many [#permalink]  23 Sep 2008, 13:04
Joanna bought only $0.15 stamps and$0.29 stamps. How many $0.15 stamps did she buy? (1) She bought$4.40 worth of stamps.
(2) She bought an equal number of $0.15 stamps and$0.29 stamps.
Director
Joined: 27 Jun 2008
Posts: 547
WE 1: Investment Banking - 6yrs
Followers: 1

Kudos [?]: 48 [0], given: 92

Re: GMAT SET 19 - 7 [#permalink]  23 Sep 2008, 13:15
0.15 = x
0.29 = y

x+y = s, what is x?

(1) s=4.40 insuff
(2) x=y, dont know "how many" insuff

(1 & 2)
x+y = 4.40, x=y
eg, 10 >> 10*0.15 + 10*0.29 = 4.40

C
Director
Joined: 23 May 2008
Posts: 839
Followers: 3

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

Re: GMAT SET 19 - 7 [#permalink]  23 Sep 2008, 14:16
1)4.40 = .15x + .29y insuff.

2)x=y insuff

together

.15x/.15x +.29x = s/4.40
.15/.44 = s/4.40
s=1.50, so 10 stamps for .15 cents and 10 stamps for 29 cents
SVP
Joined: 17 Jun 2008
Posts: 1570
Followers: 12

Kudos [?]: 203 [0], given: 0

Re: GMAT SET 19 - 7 [#permalink]  25 Sep 2008, 11:53
A should be sufficient.

stmt1 says that 15x + 29y = 440 or x = (440-29y)/15

This equation is true for only positive integers of x = 10 and y = 10. Hence, should be sufficient.
Current Student
Joined: 28 Dec 2004
Posts: 3387
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 14

Kudos [?]: 186 [0], given: 2

Re: GMAT SET 19 - 7 [#permalink]  25 Sep 2008, 12:38
i too agree with A..

we know that .15x+.29y=4.4

since we can only have x and y as integers..we know that they bought 10 of each..

sufficient
Re: GMAT SET 19 - 7   [#permalink] 25 Sep 2008, 12:38
Similar topics Replies Last post
Similar
Topics:
The number of stamps that Kay and Alberto had were in the 1 11 May 2008, 11:49
The number of stamps Jim and John had were in the ratio of 2 23 Jan 2008, 13:38