A natural in craps

On the come-out roll in craps you win immediately with a 7 or 11 (a 'natural'). With two fair dice, what is the probability of an immediate win? Give a decimal to four places.

Show hints (2)+
  1. Count ways to make 7, then 11.
  2. Add the disjoint counts over 36.

Answer

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0.2222 (± 0.001)

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