The chance of rolling a 4 is 1/6 .
If you already have one, then the chance of rolling another one is 1/6 .
If you already have two, then the chance of rolling another one is 1/6 .
So, starting from the beginning, the chance of rolling three of them
IN THREE TOSSES is
(1/6) x (1/6) x (1/6) = 1/216 = about 0.46 % .
The question actually just says "the chance of rolling a 4 three times".
If you just look at it that way, the chance could be 100% ... it doesn't
say anything about how many tosses you get, and you're just going to
keep rolling that durn cube until you get three 4's.
