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I have a special 6-sided dice such that

The probability of rolling a 2 is twice the probability of rolling a 1,
the probability of rolling a 3 is thrice the probability of rolling a 1,
the probability of rolling a 4 is quadruple the probability of rolling a 1,
the probability of rolling a 5 is quintuple the probability of rolling a 1, and
the probability of rolling a 6 is hextuple the probability of rolling a 1.

What is the probability of rolling a 1?

 Jul 6, 2020
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x = prob of 1

 

x + 2x + 3x + 4x + 5x + 6x = 1

21x = 1

x = 1/21

 Jul 6, 2020

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