probability
posted by Ryan! on .
A bag contains 3 red chips, 2 blue chips, and 1 white chip. If 2 chips are chosen from the bag (without replaceent), determine the probability that they are of different colors.

ways to get two different colors
rb
rw
bw
br
wr
wb
add the probability of each of these.
I will do the first two:
Pr(rb)=3/6*2/5
Pr(rw)=3/6*1/5 
ok but how do i find the final probability?
i see how i can get the probability of a certain combination, but i don't understand how i can find that end probability. 
never mind i got it
thank you so much bobpursley! 
A bag contains 4 purple, 3 blue and 2 red cubes. Select 3 cubes and stack on table next to the bag. What is probability of the cubes being red, purple then blue