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On any roll of two dice there are 36 possible results: 1-1, 1-2, 1-3 and so on to 6-6. Of those, only six add up to 7 (1-6, 2-5, 3-4, 4-3, 5-2, 6-1), so for a single throw, your odds are 6 in 36, the same as 1 in 6 or a 16.67% chance. For two consecutive throws, you take 1 in 6 and multiply it by 1 in 6. That gives you a 1 in 36 chance (2.78%).

You can calculate the odds of rolling, say, 20 consecutive "sevens" the same way by taking the base chance, 1 in 6 (1/6) and raising it to the power of 20... slim odds indeed... one chance in 3,656,158,440,062,976 ! The exponent is always the number of consecutive events.

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16y ago

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