Question 1180752
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Even though the problem says the three dice are rolled at the same time, you can think of them as being rolled one at a time.  Then find the answer to the question by finding the probability that each successive roll gives you the desired outcome.<br>
The first roll can be any of the 6 numbers:
P(okay after 1st roll) = 6/6 = 1.<br>
The second roll must be one of the 5 remaining numbers:
P(second roll okay) = 5/6; P(okay after second roll) = (1)(5/6) = 5/6.<br>
The third roll must be one of the 4 remaining numbers:
P(third roll okay) = 4/6; P(okay after third roll) = (5/6)(4/6) = 20/36 = 5/9.<br>
ANSWER: 5/9<br>