A bag contains 5 red marbles, 6 green marbles, and 7 yellow marbles. if three marbles are randomly removed from the bag, what is the probability that they would all be green

Question

anonymous · Answer

probability first one is green is $\frac{6}{18}$
probability second one is green given the first one is green is $\frac{5}{17}$ 
and finally the probabilty the third one is green given that the first two are green is $\frac{4}{16}$

multiply these together to get our answer
you should probably reduce first

anonymous · Answer

so 1/3 x 5/17 x 1/4