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# In jar A there are 3 white balls and 2 green ones, in jar B

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Manager
Joined: 13 Jun 2005
Posts: 244
Location: Haverhill, MA
In jar A there are 3 white balls and 2 green ones, in jar B  [#permalink]

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26 Jan 2006, 18:16
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Question Stats:

100% (00:20) correct 0% (00:00) wrong based on 16 sessions

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In jar A there are 3 white balls and 2 green ones, in jar B there is one white ball and three green ones. A jar is randomly picked, what is the probability of picking up a white ball out of jar A?

a) 2/5.
b) 3/5.
c) 3/10.
d) 3/4
e) 2/3.

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Manager
Joined: 13 Dec 2005
Posts: 208
Location: Milwaukee,WI

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26 Jan 2006, 21:14
The ans should be 3/10 .

Because the probability of selecting jar A is 1/2

and the probability of choosing a white ball from jar A is 3/5

hence the probability is (1/2) * (3/5) = 3/10 .
Director
Joined: 20 Sep 2005
Posts: 981

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26 Jan 2006, 23:38
Agree with the ELOGL( Extra ordinary league of ....)
Manager
Joined: 13 Jun 2005
Posts: 244
Location: Haverhill, MA

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27 Jan 2006, 08:34
The probability of picking the first jar is Â½, the probability of picking up a white ball out of jar A
Is 3/(3+2) = 3/5. The probability of both events is 1/2 x 3/5 = 3/10.

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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!

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Joined: 09 Sep 2013
Posts: 11437
Re: In jar A there are 3 white balls and 2 green ones, in jar B  [#permalink]

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19 Aug 2018, 09:36
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Re: In jar A there are 3 white balls and 2 green ones, in jar B   [#permalink] 19 Aug 2018, 09:36
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# In jar A there are 3 white balls and 2 green ones, in jar B

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