Sum of fall dices
What is the probability that the sum of 9 will fall on a roll of two dice?
Hint: write down all the pairs that can occur as follows:
11 12 13 14 15. .
21 22 23 24. .. .
31 32. ..
. .
. . . .. . 66, count them, it's the variable n
variable m: 36, 63,. .. . write it down and count it and substitute it into the formula
Hint: write down all the pairs that can occur as follows:
11 12 13 14 15. .
21 22 23 24. .. .
31 32. ..
. .
. . . .. . 66, count them, it's the variable n
variable m: 36, 63,. .. . write it down and count it and substitute it into the formula
Correct answer:
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