SOLUTION: A box contains 4 red, 7 blue and 6 white balls. If a ball is chosen at random, a. what is the probability that it is not red? b. what is the probability to draw 3 balls of differ

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Question 1109916: A box contains 4 red, 7 blue and 6 white balls. If a ball is chosen at random,
a. what is the probability that it is not red?
b. what is the probability to draw 3 balls of different colors?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A box contains 4 red, 7 blue and 6 white balls.
If a ball is chosen at random,
a. what is the probability that it is not red?:: (7+6)/(7+6+4) = 13/17
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b. what is the probability to draw 3 balls of different colors?
# of sets of 3 balls:: 17C3
# of sets with 3 balls of different colors:: 1
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Ans 1/(17C3) = (1*2*3)/(17*16*15) = 0.0015..
Cheers,
Stan H.
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