Jack rolls 5 fair six-sided dice. What is the probability that at least three dice show the same number?
[5 C 3 * 5^2] + [5 C 4 * 5^1] + [5 C 5 * 5^0]=[250 + 25 + 1] =276 * 6 =1656 / 6^5 == 23 / 108
