SOLUTION: A small box contains 20 marbles, eight of which are green, seven are red and five are blue. If you reach in to grab three marbles, one at a time and do not replace them, what is th

Algebra ->  Probability-and-statistics -> SOLUTION: A small box contains 20 marbles, eight of which are green, seven are red and five are blue. If you reach in to grab three marbles, one at a time and do not replace them, what is th      Log On


   

Question 356666: A small box contains 20 marbles, eight of which are green, seven are red and five are blue. If you reach in to grab three marbles, one at a time and do not replace them, what is the probability that each marble will be blue? Report 5 decimal places in your answer.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
8 Green
7 Red
5 Blue
20 Total
.
.
.
P(1st Blue)=5%2F20=1%2F4
P(2nd Blue)=4%2F19
P(3rd Blue)=3%2F18=1%2F6
P(3 Blues)=%281%2F4%29%284%2F19%29%281%2F6%29=1%2F114=0.0087719