A person has the following bills: $1,$5, $10,$20, $50. How : PS Archive Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack  It is currently 21 Jan 2017, 03:58 ### 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. ### Request Expert Reply # Events & Promotions ###### Events & Promotions in June Open Detailed Calendar # A person has the following bills:$1, $5,$10, $20,$50. How

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A person has the following bills: $1,$5, $10,$20, $50. How [#permalink] ### Show Tags 02 Oct 2003, 08:41 00:00 Difficulty: (N/A) Question Stats: 0% (00:00) correct 0% (00:00) wrong based on 0 sessions ### HideShow timer Statistics This topic is locked. If you want to discuss this question please re-post it in the respective forum. 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?
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shubhangi

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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 Joined: 30 Aug 2003 Posts: 324 Location: dallas , tx Followers: 1 Kudos [?]: 26 [0], given: 0 ### Show Tags 02 Oct 2003, 09:15 again ..am confused if u can please explain _________________ shubhangi SVP Joined: 03 Feb 2003 Posts: 1603 Followers: 8 Kudos [?]: 245 [0], given: 0 ### Show Tags 03 Oct 2003, 04:59 Agree, it is 5C1+5C2+5C3+5C4+5C5=5+10+10+5+1=31 Senior Manager Joined: 30 Aug 2003 Posts: 324 Location: dallas , tx Followers: 1 Kudos [?]: 26 [0], given: 0 ### Show Tags 03 Oct 2003, 07:09 Okay !! that's easy to understand.. thanks _________________ shubhangi 03 Oct 2003, 07:09 Display posts from previous: Sort by # A person has the following bills:$1, $5,$10, $20,$50. How

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