SOLUTION: A die is rolled four times. Find P(four of the same number)

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Question 751761: A die is rolled four times. Find P(four of the same number)
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
it's 1 in 6^3 or 1 in 216.
Why not 1 in 6^4?
It would be that if you asked the chances of 4 rolls of a particular number, but here it's just the same, so the first roll is 'free.' only the next three rolls must match.