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(a) There are  chairs in a row. Find the number of ways of choosing  of these chairs, so that no two chosen chairs are adjacent.

(b) There are 10 chairs in a circle, labelled from 1 to 10. Find the number of ways of choosing 3 of these chairs, so that no two chosen chairs are adjacent.

(c) There are  chairs in a circle, labelled from 1 to  Find the number of ways of choosing  of these chairs, so that no two chosen chairs are adjacent.

 May 21, 2020
 #1
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Dude 4 questions in a row... what is this... your homework? If so, I recommend you only asking one question and trying to understand the topic. Also, why didn't you do this before today... procrastinating will not be good in the long run

 May 21, 2020
 #2
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I forgot. Please help though. I beg you.

 May 21, 2020
 #3
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I'm sorry but I'm not that talented in probability... Alebra and Geometry is more my thing... I would attempt it but I don't want to get a wrong answer.

madyl  May 22, 2020
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who is online right now?

 May 22, 2020
 #5
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You can check in the very bottom of this page or any page on this site. As of now, there are currently 5 members online, and 29 total people including members and non members online.

Wow! That changed fast... now there are 6 members on line and 41 total people. cheeky

 May 22, 2020
edited by madyl  May 22, 2020
 #6
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who is good at probability? Cphil?

Jonjon  May 22, 2020
 #7
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haha I'm also trying to do this problem last-minute right now

but i advise u to read the message board instead. there are a lot of really useful tips there

 May 22, 2020

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