Q: What is the probability of rolling a sum of 9 or less with two dice?

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The probability is 1, if the dice are rolled often enough.

The probability of not rolling a sum of six with two fair dice is 1 minus the probability of rolling a sum of six. There are 36 permutations of rolling two dice. Of these, five sum to six, 1+5, 2+4, 3+3, 4+2, and 5+1. The probability, then of rolling a sum of six is 5 in 36. The probability, then of not rolling a sum of six is 31 in 36, or about 0.8611.

It is 15/36.

Zero is the probability of rolling a sum of 15 on two fair dice; the maximum value is 12.

The probability is certain or 1. The max you can roll is 12 so it is certain the sum will be less than 13.

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The probability is 1, if the dice are rolled often enough.

The probability of not rolling a sum of six with two fair dice is 1 minus the probability of rolling a sum of six. There are 36 permutations of rolling two dice. Of these, five sum to six, 1+5, 2+4, 3+3, 4+2, and 5+1. The probability, then of rolling a sum of six is 5 in 36. The probability, then of not rolling a sum of six is 31 in 36, or about 0.8611.

3/11

It is 15/36.

Zero is the probability of rolling a sum of 15 on two fair dice; the maximum value is 12.

The probability of rolling a sum of 11 with 2 dice is: P(11) = 1/18.For explanation see answer to question: "What is the probability of rolling 7 or 11 with 2 dice?".Read more: What_is_the_probability_of_rolling_7_or_11_with_2_dice

The probability is certain or 1. The max you can roll is 12 so it is certain the sum will be less than 13.

Assuming 2 dice, it is 0.

The probability of rolling 12 with 2 dice is 1 in 36. The probability of not rolling 12 with 2 dice is 35 in 36.

5 in 36

There are 36 permutations of two dice. Of these, 6 have a sum less than five, 1+1, 1+2, 1+3, 2+1, 2+2, and 3+1. The probability, then, of rolling a sum less than five on two dice is 6 in 36, or 1 in 6, or about 0.1667.

The probability is 1.