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# A jar contains two red marbles, three blue marbles, and four

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Intern
Joined: 23 May 2008
Posts: 48

Kudos [?]: 98 [0], given: 0

A jar contains two red marbles, three blue marbles, and four [#permalink]

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08 Sep 2008, 14:57
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

A jar contains two red marbles, three blue marbles, and four green
marbles. Niki draws one marble from the jar, and then Tom draws a
marble from those remaining. What is the probablity that Niki draws a
green marble and Tom draws a blue marble? Express your answer as a
common fraction. (http://mathforum.org/library/drmath/view/56491.html)

Kudos [?]: 98 [0], given: 0

Senior Manager
Joined: 09 Oct 2007
Posts: 463

Kudos [?]: 56 [0], given: 1

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08 Sep 2008, 15:14
(Green/Total)(Blue/Total-1) = (4/9)(3/8) = 1/3*2 = 1/6

Kudos [?]: 56 [0], given: 1

Intern
Joined: 23 May 2008
Posts: 48

Kudos [?]: 98 [0], given: 0

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08 Sep 2008, 15:41
Thank you asdert. How does this account for the possibility that Niki may or may not have picked a green marble?

Kudos [?]: 98 [0], given: 0

Re: Marbles   [#permalink] 08 Sep 2008, 15:41
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# A jar contains two red marbles, three blue marbles, and four

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