Question 21For 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?$\dfrac{4}{63}$$\dfrac{1}{8}$$\dfrac{8}{63}$$\dfrac{1}{6}$$\dfrac{2}{7}$