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How many times must you throw two standard dice to be sure you get the same sum at least twice?
The probability of gettting a particular sum on a standard set of dice depends on which sum you are seeking. For example, the sums of 2 and 12 have a probability of 1 in 36, or about 0.0278; while the sum of 7 has a probability of 6 in 36, or 1 in 6, or about 0.167.Specifically answering the question; it is not possible to guarantee a particular outcome in a random throw, or in a series of random throws, of the dice. You can only talk about probability. Let's take the worst case of trying to throw a 2 or a 12. Even of you throw the dice 100 times, the probability is only 0.0278100, or about 2.34 x 10-156 that you will not throw the 2 or 12; so, the probability is extremely good that you will throw a 2 or 12 in 100 throws, but it is not guaranteed. That's the thing about probability.
What is the probability of getting a multiple of 5 when rolling 2 dice?
The probability is 7/36
What is the probability of rolling 2 dice total under 7 with 1 dice being 3?
It is 5/11.
How do you get the probability of dice rolls?
A normal die is a six faced cube, so the probability of each face coming up is one in six and there are six possible outcomes. If you throw two dice, then there are 36 (6x6) possible outcomes, and you would simply divide the desired result set by the possible result set. For instance, the probability of throwing a 12 is 1 in 36, while the probability of throwing an 11 is 2 in 36 or 1 in 18 because there are two ways to throw the 11. Similarly, the probability of throwing a 7 is 6 in 36 or 1 in 6, because there are 6 different ways to throw a 7. Continuing with more and more dice, it is a simple matter of counting and arithmetic.
You roll two dice What is the probability of the event that you roll a total of seven or twelve on the two dice?
The probability is 7/36.
