Phil has 7 green marbles and 3 purple marbles in a bag. He removes a marble at random, records the color, puts it back, and then repeats this process until he has withdrawn 6 marbles. What is the probability that exactly three of the marbles that he removes are green? Express your answer as a decimal rounded to the nearest thousandth.

Guest Dec 10, 2017

#2**0 **

I’m surprised the purple marbles haven’t filed a grievance about the green marbles.

JacobBernoulli Dec 12, 2017