SOLUTION: A bag contains 6 red balls and 3 blue balls. 3 balls are selected at random. Find the probablity of selecting 3 red balls?

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Question 473247: A bag contains 6 red balls and 3 blue balls. 3 balls are selected at random. Find the probablity of selecting 3 red balls?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
There are 6+3 = 9 balls total.


P(3 red) = P(red)*P(red)*P(red)


P(3 red) = (6/9)*(5/8)*(4/7) .... Note: I'm assuming that the balls are NOT replaced (or put back in)


P(3 red) = 120/504


P(3 red) = 5/21