Let ? be a complex cube root of unity with ? ? 1. A fair die is thrown three times. If r1, r2 and r3 are the numbers obtained on the die, then the probability that 3120?+?+?=rrr is?

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Let ? be a complex cube root of unity with ? ? 1. A fair die is thrown three times. If r1, r2 and r3 are the numbers obtained on the die, then the probability that 3120?+?+?=rrr is?

Let ? be a complex cube root of unity with ? ? 1. A fair die is thrown three times. If r1, r2 and r3 are the numbers obtained on the die, then the probability that 3120?+?+?=rrr is?

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Let ? be a complex cube root of unity with ? ? 1. A fair die is thrown three times. If r1, r2 and r3 are the numbers obtained on the die, then the probability that 3120?+?+?=rrr is?

Let ? be a complex cube root of unity with ? ? 1. A fair die is thrown three times. If r1, r2 and r3 are the numbers obtained on the die, then the probability that 3120?+?+?=rrr is?

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