For a particular peculiar pair of  dice,  the probabilities of rolling 1, 2, 3, 4, 5, and 6 on each die are in the ratio $1:2:3:4:5:6$.  What is the probability of rolling a total of 7 on the two dice?
<|im_start|>system
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<|im_start|>user
For a particular peculiar pair of  dice,  the probabilities of rolling 1, 2, 3, 4, 5, and 6 on each die are in the ratio $1:2:3:4:5:6$.  What is the probability of rolling a total of 7 on the two dice?
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<|im_start|>assistant

user
\frac{8}{63}
For a particular peculiar pair of  dice,  the probabilities of rolling 1, 2, 3, 4, 5, and 6 on each die are in the ratio $1:2:3:4:5:6$.  What is the probability of rolling a total of 7 on the two dice?
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