Question 327495: An urn contains 4 purple marbles and 3 pink ones. Two marbles are drawn from the urn. what is the probability that both marbles are purble
Sorry the question i just posted was incorrect This is the correct one
Thanks,
Oskar :o)
Answer by galactus(183)   (Show Source):
You can put this solution on YOUR website! Without replacement:
There are 4 purples to choose from out of the 7, so the first one has prob. 4/7.
Now, since the first one is not put back, there are 3 purples to choose from and 6 balls in total. So, the second has prob. 3/6=1/2
(4/7)(3/6)=2/7
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