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sum of outcomes of three dice (Posted on 2009-11-20) Difficulty: 2 of 5
What is the probability that the sum of outcomes of three dice thrown together is 9?

  Submitted by Vishal Gupta    
Rating: 3.0000 (1 votes)
Solution: (Hide)
Ans. 25/216

Probability of getting sum of two throws as 3,4,5,6,7,8 is easily calculated. for 3 its 1+2 or 2+1 (2 combinations out of 36 for roll of two dice) for 4 its 1+3 or 2+2 or 3+1(3 combinations out of 36 for roll of two dice) adding for 3,4,5,6,7,8 we get 25/36

For each of these cases there is one matching value of the third dice, So multiply by 1/6 to get 25/216

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Puzzle Thoughts K Sengupta2023-08-05 03:59:27
SolutionsolutionDej Mar2009-11-20 16:08:34
pair plus a thirdJer2009-11-20 15:14:22
re: Three Blind DiceVishal Gupta2009-11-20 13:52:35
Three Blind DiceJim Keneipp2009-11-20 13:42:04
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