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) (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
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