An \(n\)-sided die has sides labeled with the numbers \(1\) through \(n,\) inclusive, and has an equal probability of

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An \(n\)-sided die has sides labeled with the numbers \(1\) through \(n,\) inclusive, and has an equal probability of landing on any side when rolled. If the die is rolled twice, what is the probability of rolling \(1\) both times?

(1) If the die is rolled twice, the probability that the two rolls are different is \(80\%.\)

(1) If the die is rolled twice, the probability that the two rolls are equal is \(\dfrac78.\)

Answer: A

Source: Manhattan GMAT