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If I roll a regular six-sided die, what is the probability that the score is three?
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A regular six-sided die is cube-shaped, with faces labelled one, two, three, four, five, and six.
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The probability of an event occurring can be written as a fraction.
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The numerator is the number of successful outcomes, and the denominator is the number of possible outcomes.
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In this case, the number of possible outcomes is six, as there are six faces on the die.
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There is only one successful outcome, when the die lands on number three.
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We can therefore say that the probability of scoring a three on a regular six-sided die is one-sixth or one in six.