# 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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