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# Permutation and Combination

Author Message
Intern
Joined: 02 Dec 2017
Posts: 6

### Show Tags

03 Dec 2017, 21:48
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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You are to make a sitting arrangement for 10 school visitor.

a. How many possible sitting arrangements can you make it all?
b. How many possible sitting arrangements can you make if two visitors must sit next to each other?

--== Message from the GMAT Club Team ==--

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This discussion does not meet community quality standards. It has been retired.

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Intern
Joined: 27 Jul 2017
Posts: 18

### Show Tags

03 Dec 2017, 22:24
1
A) Possible arrangements In circular seating arrangement is 9! And in linear arrangement is 10!
B) circular arrangement - 8!*2!
Linear arrangement - 9!*2!

Sent from my GT-N7100 using GMAT Club Forum mobile app
Math Expert
Joined: 02 Sep 2009
Posts: 52390

### Show Tags

04 Dec 2017, 07:01
Anica123 wrote:
You are to make a sitting arrangement for 10 school visitor.

a. How many possible sitting arrangements can you make it all?
b. How many possible sitting arrangements can you make if two visitors must sit next to each other?

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Re: Permutation and Combination &nbs [#permalink] 04 Dec 2017, 07:01
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