I am assuming you meant "Roll a sum of 10".
First find all the combinations:
1st dice 2nd dice
4 + 6
5 + 5
6 + 4
Next, calculate the probability of rolling a 4,5, or 6: 3/6 => 1/2 on first dice
Then, calculate the probability of rolling a number on the second dice that adds up with the first number to make 10.
Note: once you roll the first number only 1 other number will make a match, so the probability on the second dice is: 1/6 on second dice
Finally, multiply the two fractions together: 1/2 x 1/6 = 1/12
Your probability is: 1/12 in fraction form, .083 in decimal form, and 8.33% in percent form.
Hope this helps and May the Force Be With You!
-Jabba
