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A fast food company plans to build 4 new restaurants. If

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Manager
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A fast food company plans to build 4 new restaurants. If [#permalink] New post 29 May 2006, 15:43
A fast food company plans to build 4 new restaurants. If there are 12 sites that satisfy the company's criteria for location of new restaurants, in how many ways can the company select the 4 sites needed if order does not matter?

a. 48
b. 288
c. 495
d. 990
e. 11,880

Please explain your answer.

Last edited by tl372 on 29 May 2006, 18:00, edited 1 time in total.
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 [#permalink] New post 29 May 2006, 16:08
do you mean 3 or 4? I am sorry, I was not sure if the 3 was typo...

well I am assuming it is a 4..hehee.

12C4 = (12*11*10*9)/(4*3*2*1) = 495

C is my answer
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 [#permalink] New post 29 May 2006, 18:01
Sorry, I meant to write 4 sites. I edited the question.
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 [#permalink] New post 29 May 2006, 21:30
acfuture wrote:
do you mean 3 or 4? I am sorry, I was not sure if the 3 was typo...

well I am assuming it is a 4..hehee.

12C4 = (12*11*10*9)/(4*3*2*1) = 495

C is my answer

Agree same approach
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 [#permalink] New post 29 May 2006, 21:48
The number of ways = 12C4 = 495
  [#permalink] 29 May 2006, 21:48
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