theperfectgentleman wrote:
Three six faces fair die are thrown together.What is the probability that the sum of the numbers appearing on the die is 12?
(a) 27/216
(b) 25/216
(c) 23/216
(d) 17/216
(c) 24/216
A pretty easy problem, if one can find out the sum of numbers adding to 12 without listing. Any suggestions?
With listing, possibly the easiest method.
For sum to be 12 with three dice, we could have a {(1,5,6),(2,4,6),(2,5,5),(3,3,6),(3,4,5),(4,4,4)}
For the combinations (1,5,6),(2,4,6) and (3,4,5) : There are 3!
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