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OpenStudy (anonymous):
A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn at random. What is the probability of first drawing a blue marble and then, without replacing it, drawing a red marble?
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OpenStudy (lucaz):
you have a total of 5+6+9=20 marbles after you draw a blue marble your're left with 19
OpenStudy (lucaz):
so the probability is..
OpenStudy (lucaz):
|dw:1391555637286:dw|
OpenStudy (anonymous):
I came up with 3/38?
OpenStudy (anonymous):
@lucaz
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OpenStudy (lucaz):
1/380
OpenStudy (lucaz):
20 times 19
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