The answer for this is 10
Its -3 because of the 2 open circles on the line x = -3
If you have five dice you just have to count up all possible outcomes for each dice. Which means you would have about 30 different possible outcomes.
The possibility of all five landing on the same number is very uncertain considering one dice had a 1/6 chance of landing on a certain number.
C equals eight because it is adding three