Roll three fair dice. What is the probability that the sum of the numbers is at most 6?
I'm going to make a guess
216 possible rolls
8 rolls possible less than or = 6
8/216 = 1/27 ?
Correct? Anyone?
Probabilty that a "3" is rolled = 1/216
Probabilty that a "4" is rolled = 3/216
Probability that a "5" is rolled = 6/216
Probability that a "6" is rolled = 10/216
Sum of the above probabilities = 20 / 216 = 5 / 54
Ooops....... forgot to add in the 5's and 6's properly ! Thanx Chris !