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# A bag contains six marbles: two red, two blue, and two

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A bag contains six marbles: two red, two blue, and two [#permalink]

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05 Jan 2004, 13:39
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* A bag contains six marbles: two red, two blue, and two green. If two marbles are drawn at random, what is the probability that they are the same color?
A. 1/3
B. 1/2
C. 1/8
D. 1/4
E. 1/5

* A bag contains 3 red marbles, 3 blue marbles, and 3 green marbles. If a marble is randomly drawn from the bag and a fair, six-sided die is tossed, what is the probability of obtaining a red marble and a 6?
A. 1/15
B. 1/6
C. 1/3
D. 1/4
E. 1/18

* A certain bag contains red, blue, yellow, and green marbles. If a marble is randomly drawn from the bag, the probability of drawing a blue marble is .2, the probability of drawing a red marble is .3, and the probability of drawing a yellow marble is .1. What is the probability of drawing a green marble?
A. .5
B. .6
C. .2
D. .4
E. .3

Vivek
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"Start By Doing What Is Necessary ,Then What Is Possible & Suddenly You Will Realise That You Are Doing The Impossible"

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05 Jan 2004, 13:45
1-E) It does not matter what you pick on first draw. You have 1/5 to pick a marble of the same color from the remaining 5 marbles

2-E) 1/3 * 1/6 = 1/18

3-D)
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Best Regards,

Paul

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05 Jan 2004, 13:49
You gotta do better than that, Vivek!!!

Paul does those in his sleep!
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Joined: 15 Dec 2003
Posts: 4289
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05 Jan 2004, 13:51
Yup, those were rather easy...
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Best Regards,

Paul

05 Jan 2004, 13:51
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# A bag contains six marbles: two red, two blue, and two

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#1 /usr/share/pear/PHPTAL.php(1103): PHPTAL_Dom_SaxXmlParser->parseString(Object(PHPTAL_Dom_PHPTALDocumentBuilder), 'parse()
#3 /usr/share/pear/PHPTAL.php(659): PHPTAL->prepare()
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#11 {main}