SOLUTION: A jar contains 7 white marbles and 7 red marbles. What is the probability of drawing 2 white marbles and 1 red?

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Question 1175705: A jar contains 7 white marbles and 7 red marbles. What is the probability of drawing 2 white marbles and 1 red?
Found 2 solutions by ikleyn, ewatrrr:
Answer by ikleyn(52754) About Me  (Show Source):
You can put this solution on YOUR website!
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The problem is composed INCORRECTLY.

In order for to be correct, the number of marbles, taken at a time, must be specified.


Did you compose this problem on your own ?


It makes some  strange  impression,  as if it is created by a person,  who does not know the subject.



Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
 14 marbles:  7W  and 7R
Drawing one at a time:
with replacement:  P(2W and 1R) = (1/2)^3
w/o replacement (in the order listed):  P = (7/14)(6/13)(7/12)

Wish You the Best in your Studies.