Question 21485: when you roll a pair of dice what is the probability of a sum of 7 Found 2 solutions by josmiceli, fishe20d:Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! First answer the question, how many possible outcomes when I roll a pair
of dice?
One die alone can come up 6 ways (6 faces on a cube)
Each of those 6 outcomes can be combined with 6 possible outcomes
for the other die.
That is 6x6 possible outcomes, or 36
How many ways can I make 7 with the pair of dice?
For each of the faces of one die, 1,2,3,4,5,6 there is one and only one
face of the other die that will make the sum 7
1 + 6
2 + 5
3 + 4
4 + 3
5 + 2
6 + 1
These are 6 different combinations
There is a 6/36 or 1/6 chance of rolling a 7 for perfect dice
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