Bunuel wrote:
What is the probability of rolling the same number exactly three times with five six-sided dice?
A. 1/5
B. 5/18
C. 35/216
D. 125/648
E. 225/1296
Kudos for a correct solution.
Bunuel
You sure (D) is correct?
The question says that a number must occur exactly thrice.
The Original solution takes into account the favorable cases as
6C1(the number that will occur thrice) * 5C3(choosing the three positions for that number ) *5 * 5(the other two numbers)
But in this case, the other two numbers
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