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# Using the following bills: \$1, \$5, \$10, \$20, \$50--How many

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Joined: 11 May 2004
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Location: New York
Using the following bills: \$1, \$5, \$10, \$20, \$50--How many [#permalink]

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08 Nov 2005, 19:18
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Using the following bills: \$1, \$5, \$10, \$20, \$50--How many unique sums can be formed using any number of these bills only once?

20
24
31
75
120

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Intern
Joined: 06 Aug 2005
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08 Nov 2005, 19:23
total combination 5c0+5c1+5c2+5c3+5c4+5c5) =32.
From this subract 5c0 which is none selected.
So, 31.

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08 Nov 2005, 19:23
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