Posted by **Junior** on Friday, May 18, 2012 at 1:07pm.

A bag contains 4 green marbles, 6 red marbles, and 2 white marbles. Three marbles are drawn at random with replacement. With replacement means that after a marble is drawn, it is replaced before the next one is drawn. What is the probability of not green, not red, not white?

- Math -
**Steve**, Friday, May 18, 2012 at 2:13pm
p(~g) = 8/12 = 2/3

p(~r) = 6/12 = 1/2

p(~w) = 10/12 = 5/6

p(~g,~r,~w) = 2/3 * 1/2 * 5/6 = 5/18

- Math -
**PsyDAG**, Friday, May 18, 2012 at 2:14pm
Not green = (6+2)/12

Not red = (4+2)/12

Not white = (4+6)/12

The probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

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