MediumProbability
Galileo’s Three Dice
OptiverIMC Trading
Three fair dice are rolled. Gamblers noticed sums of 10 appear more often than sums of 9, though both can be written as 6 unordered combinations. What is the probability of rolling a sum of exactly 10?
Approach
Unordered triples are not equally likely.
Count permutations of each combination.
Answer
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The answer is 0.125. Sign in free for the full worked solution and to check your own answer.
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