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jmc

counting and probability junior

Problem

What is the probability that if you roll two fair, standard six-sided dice, the difference between the two numbers rolled will be 0? Express your answer as a common fraction.
Solution
If the difference between the two rolls is 0, then the rolls must be the same. Regardless of what the first roll is, the second roll is the same with probability.
Final answer
\frac{1}{6}