Three marbles are randomly selected, without replacement, from a bag containing two red, three blue and four green marbles. What is the probability that one marble of each color is selected? Express your answer as a common fraction.
3*2*1 = 6 ways to choose 3 marbles of different colour.
(2*3*4)/(9*8*7) = probability of choosing 3 marbles of different colour, in a specific order.
6*(2*3*4)/(9*8*7) = 2/7
I hopet his helped. :))
=^._.^=
