5 Ways To Calculate Multiple Dice Probabilities

First die shows k-1 and the second shows 1. First die shows k-2 and the second shows 2. First die shows k-3 and the second shows 3. First die shows k-4 and the second shows 4. First die shows k-5 and the second shows 5. First die shows k-6 and the second shows 6.

The mean is (r+1)/2. The variance is n(r^2-1)/12. The standard deviation is the square root of the variance.