10 oz+ 14 oz + 40 oz = 64 oz
1 pound= 16 oz
64oz/16oz=4 pounds
3a + 6 -4a + 4b
-1a + 6 + 4b
( not sure if this is a correct answer)
Assuming that these are 6-sided dice, We can roll a 6 and a 3, and 5 and a 2, or a 4 and a 1, in order to get a difference of 3.
1/6 chance for each side, 1/36 to roll any one of those combinations.
Multiply that chance by 3, for the 3 combinations we can roll to give us a difference of 3, and we get 3/36, or an 8.(3)% reoccurring chance.<span />