If three standard, six-faced dice are rolled, what is the probability that the sum of the three numbers rolled is 9? Express your answer as a common fraction.
I need help!!!! I don't know what to do! This means a lot to me!!!!!
In how many ways can you make a 9 out of 3 dice? Well, there are many ways as follows:
6+2+1=9
5+3+1=9
4+4+1=9
3+4+2=9.......and so on. If you listed all possible combination that would sum up to 9, you will see that there are: 25 ways of summing up to 9. Therefore, the probability is:
25 / 6^3 =25 /216
