Probability

Prime Sum with Heads and a Die

Difficulty
xxx xxxx xxx xxxx xxxxx xxx xxxx x xxxx xxx-xxxxx xxx. xxx \(x\xx\{x,x,x\}\) xx xxx xxxxxx xx xxxxx xxx \(x\xx\{x,x,x,x,x,x\}\) xx xxx xxx xxxxxxx. xxxx xx \(\xxxxxx{x}(x+x \xxxx{ xx xxxxx})\)? xxx xxx xxxxxxxxx xx \(x\).

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