A bag contains 5 orange, 8 green, and 6 yellow marbles. Fine the probability of picking three 3 yellow marbles if each marble is NOT returned to the bag before the next marble is picked?
The probability of picking a yellow marble the first time is 6/19
Then if you don't replace it, the probability of picking a yellow one again becomes 5/18
Then, to pick one a third time without replacing it becomes 4/17
So, the total probability is
(6/19)(5/18)(4/17) = 120/5814 = 0.021
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