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In the below 10*10 matrix, what is the probability of selecting

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In the below 10*10 matrix, what is the probability of selecting [#permalink]

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New post 25 Nov 2017, 02:32
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In the below 10*10 matrix, what is the probability of selecting a star from odd row and odd column, given that a star is already selected?

* 0 0 0 0 0 0 0 0 0
* * 0 0 0 0 0 0 0 0
* * * 0 0 0 0 0 0 0
* * * * 0 0 0 0 0 0
* * * * * 0 0 0 0 0
* * * * * * 0 0 0 0
* * * * * * * 0 0 0
* * * * * * * * 0 0
* * * * * * * * * 0
* * * * * * * * * *

1) 21/100
2)21/55
3) 84/121
4) 55/100
5) None of these

Please provide the explanation as well.

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Senior Manager
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G
Joined: 21 Aug 2016
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WE: Information Technology (Computer Software)
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Re: In the below 10*10 matrix, what is the probability of selecting [#permalink]

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New post 25 Nov 2017, 02:35
VeritasPrepKarishma

Please help with the above question. Thanks.

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

This is not a quality discussion. 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: In the below 10*10 matrix, what is the probability of selecting   [#permalink] 25 Nov 2017, 02:35
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In the below 10*10 matrix, what is the probability of selecting

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