Probability

led23

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Joined
Feb 24, 2011
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Could anyone help me out?

There are 100 marbles in a bag, 50 blue, 40 red, and 10 purple. You draw three times returning a marble to the bag each time you draw (this makes one game). What is the probability of getting 1 purple, 1blue, and 1 red? Purple, then blue, then purple? Red, then blue, then red?

I found out that there are 27 total possibilities, so would it just be # of times that it comes up /27 or would the probability of picking each marble play into this also?
 
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