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Summer Clouds moderators

10/11/2017 at 14:04
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Two standard, six-sided dice are rolled. What is the probability that the positive difference between the numbers rolled is 1? Express your answer as a common fraction. 




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    Lê Quốc Trần Anh Coordinator 10/11/2017 at 15:14

    There are all: \(6\cdot6=36\left(ways\right)\) for the two dice to roll.

    The possible ways of the two dice are: 6-5 ; 5-4 ; 4-3 ; 3-2 ; 2-1 and reverse the order

    So the probability is: \(\dfrac{5\cdot2}{36}=\dfrac{5}{18}\)

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    Phạm Tuấn Đạt 11/11/2017 at 13:25

    There are all: 6⋅6=36(ways) for the two dice to roll.

    The possible ways of the two dice are: 6-5 ; 5-4 ; 4-3 ; 3-2 ; 2-1 and reverse the order

    So the probability is: \(\dfrac{5.2}{36}=\dfrac{10}{36}=\dfrac{2}{18}\)


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