Best Answer

1/4 = 0.25

If the second die is 1 or 2, then there are 12 possible outcomes.

To score 7: 5+2 or 6+1 ⇒ 2 rolls

To score 8: 6+2 ⇒ 1 roll

⇒ to score 7 or 8: 2 + 1 = 3 rolls

So there are 3 rolls to score the required sums out of 12 possible rolls, giving a probability of:

3/12 = 1/4 = 0.25

Q: What is the probability if rolling a sum of 7 or 8 given the second die is a 1 or a 2?

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assuming a single six sided die the probability of rolling a three is 1/6

Probability of rolling an even number on a die is 1/2.

5/6

The probability of rolling a 3 or 4 with a 6 sided die is 2 over 6. Also known as one/third.

The probability of rolling a 4 in a die is 1 in 6, or about 0.1667. The probability, then, of rolling a 4 in at least one of two dice rolls is twice that, or 2 in 6, or 0.3333. The probability of rolling a sum of 4 in two dice is 3 in 36, or 1 in 18, or about 0.05556.

Related questions

On a regular number cube, it is 1/6.

Assuming you are talking about fair, six-sided dice, then the probability of rolling a 1 on the first roll in 1/6, and the probability of rolling a 2 on the second roll is 1/6. Putting these together, the probability of rolling 1 on the first die and 2 on the second die is 1/36. If you do not care about the order, then you could roll 1,2 or 2,1; in this case the probability would be 2/36, or 1/18.

0.25 ( P = 0.5 each time)

The probability of not rolling a 6 is 5/6.

The probability is 1 out of 36, or about 3%, I think.

The probability is 1/6.

If it is a fair die and rolled fairly, the two events are independent so that the probability is 1/6.

None, because you cannot have the first or second dice: it is the first die or second die. The probability is 1/6 * 1/2 = 1/12

The probability of rolling a 5, based on the information given, is 80/375 or 16/75. Your problem describes a relative frequency approximation of probability.

The probability of rolling a 2 is 1 in 6. The probability of rolling an even number is 3 in 6. The probability of doing both, on two rolls, is 3 in 36, or 1 in 12.

The probability of rolling a number greater than 6 on a die is 0.

The probability of rolling a 7 on a standard die is 0. It will not ever happen.