SOLUTION: Two marbles are drawn in succession from a box containing 3 blue marbles and 7 red ones. What is the probability of obtaining and of each color?

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Question 1030408: Two marbles are drawn in succession from a box containing 3 blue marbles and 7 red ones. What is the probability of obtaining and of each color?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
You could choose a red then blue or blue then red so calculate each probability.
P%28R%2CB%29=%287%2F10%29%283%2F9%29=7%2F30
P%28B%2CR%29=%283%2F10%29%287%2F9%29=7%2F30
So then,
P=P%28R%2CB%29%2BP%28B%2CR%29
P=2%287%2F30%29
P=7%2F15