SOLUTION: Hi ive been having alot of trouble figuring out the answer to this question i mean i know the answer is 2/7 but i just dont get how... The question is: an urn contains 4 orange mar

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Question 327494: Hi ive been having alot of trouble figuring out the answer to this question i mean i know the answer is 2/7 but i just dont get how... The question is: an urn contains 4 orange marbles and 3 pink ones. Two marbles are drawn at random. what is the probability that both marbles are purple if the marbles are drawn Without Replacement? It would help if you showed your work so i can try to understand the procedure :o)

thanks,
Oskar :)
Found 2 solutions by stanbon, galactus:
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
The question is: an urn contains 4 orange marbles and 3 pink ones.
Two marbles are drawn at random.
what is the probability that both marbles are purple if the marbles are drawn Without Replacement?
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There are no purple marbles in the urn so the probability is zero.
Cheers,
Stan H.

Answer by galactus(183) (Show Source):
You can put this solution on YOUR website!
Actually, for this problem, the probability is 0. That's because there are no purple marbles in the urn. Just orange and pink. Therefore, purple can not be drawn at all.