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forum.virtualchallengemeets.com • View topic - TMSCA 11 #21

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TMSCA 11 #21

What could be so hard. It's a multiple-choice test for Pete's sake.
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TMSCA 11 #21

Postby adub427 » Sat Feb 27, 2010 9:43 pm

Joe's Pizzeria offers 9 varieties of pizza during their lunch buffet. How many ways could Mary select 4 slices of pizza?
a) 126 b) 495 c) 729 d) 80 e) 3024
The answer is b, but I can't seem to figure out how or why. Any help would be appreciated.
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Re: TMSCA 11 #21

Postby sqrtneg1 » Sat Feb 27, 2010 10:21 pm

This is a simple application of balls and bins (its been posted many times on this forum, use the search function). Thus, the answer is [unparseable or potentially dangerous latex formula]
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