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

It is currently 17 Sep 2014, 08:05

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A person has the following bills: $1, $5, $10, $20, $50. How

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
A person has the following bills: $1, $5, $10, $20, $50. How [#permalink] New post 02 Oct 2003, 08:41
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A person has the following bills: $1, $5, $10, $20, $50. How many unique sums can one form using any number of these bills only once?
_________________

shubhangi

Intern
Intern
avatar
Joined: 29 Aug 2003
Posts: 49
Location: Detroit, MI
Followers: 0

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

Re: PS [#permalink] New post 02 Oct 2003, 09:10
shubhangi wrote:
A person has the following bills: $1, $5, $10, $20, $50. How many unique sums can one form using any number of these bills only once?


Num of unique sums we get using 1 bill at a time = 5
Num of unique sums we get using 2 of the 5 bills at a time = C(5,2) = 10
Num of unique sums we get using 3 of the 5 bills at a time = C(5,3) = 10
Num of unique sums we get using 4 of the 5 bills at a time = C(5,4) = 5
Num of unique sums we get using 5 bills at a time = 1

So, answer = 5 + 10 + 10 + 5 + 1 = 31

Am I right?
Senior Manager
Senior Manager
avatar
Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
 [#permalink] New post 02 Oct 2003, 09:15
again ..am confused
if u can please explain
_________________

shubhangi

SVP
SVP
User avatar
Joined: 03 Feb 2003
Posts: 1613
Followers: 6

Kudos [?]: 46 [0], given: 0

 [#permalink] New post 03 Oct 2003, 04:59
Agree, it is 5C1+5C2+5C3+5C4+5C5=5+10+10+5+1=31
Senior Manager
Senior Manager
avatar
Joined: 30 Aug 2003
Posts: 325
Location: dallas , tx
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
 [#permalink] New post 03 Oct 2003, 07:09
Okay !!
that's easy to understand.. thanks
_________________

shubhangi

  [#permalink] 03 Oct 2003, 07:09
    Similar topics Author Replies Last post
Similar
Topics:
8 Experts publish their posts in the topic Max has $125 consisting of bills each worth either $5 or $20 Bunuel 8 08 Oct 2012, 01:53
An envelope contains 5, 10, 20 and 50 banknotes. If the kevincan 5 19 Jul 2006, 13:52
How many nickles does bill have? 1. Bill has a total of 17 GMATT73 10 12 Dec 2005, 06:22
Using the following bills: $1, $5, $10, $20, $50--How many desiguy 1 08 Nov 2005, 18:18
Using the following bills $1, $5, $10, $20, $50, how many nocilis 4 22 Jan 2005, 21:05
Display posts from previous: Sort by

A person has the following bills: $1, $5, $10, $20, $50. How

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.