500
When playing Yahtzee you roll 5 , 5, 5, 2, 3. You decide to re-roll the 2 and 3. You can roll each die twice, hoping for 5's.
What is the probability that you get no additional 5's in either of the two rolls?
No 5's for either roll means that you rolled 4 times and did not get a 5.
P(not 5) = 5/6 * 5/6 * 5/6 * 5/6