Question 97958: An run contains 8 red, 3 white and 9 blue balls if 3 balls are drawn at random, determine the probability that (a)all 3 are red (b) all 3 are white (c) 2 are red and 1 is blue (d) atleast one is white (e) 1 of each colour is drawn (f) the balls are drawn in the order, red, white, blue.
thanks
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! An run contains 8 red, 3 white and 9 blue balls if 3 balls are drawn at random, determine the probability that
(a)all 3 are red...............8C3/20C3
(b) all 3 are white............3C3/20C3
(c) 2 are red and 1 is blue....[8C2*9C1]/[20C3]
(d) atleast one is white.......1-[3C3/20C3]
(e) 1 of each colour is drawn..[3!*8*3*9]/20C3
(f) the balls are drawn in the order, red, white, blue....[8*3*9]/20C3
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Cheers,
Stan H.
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