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1 out of 2 if the die is six-sided.

Q: What are the probability of rolling a prime number on one roll of a die?

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The probability is 5/12.

1 in 6, or 0.17.

First you need to work out the probability of rolling a prime number. The prime numbers on a die are 2, 3 and 5. Thus the probability of rolling a prime number is 3/6 which can be simplified to 1/2. The probability of rolling a number greater than 1 is 5/6. The probability of rolling one on one dice and one on the other is therefore 1/2 x 5/6 = 5/12. There are two possible ways round these options could come though. You might get the number greater than one on the first roll, and the prime on the second. Thus we need to multiply the probability by 2, which gives us the final answer of 5/6.

It is 1 (a certainty) if you roll it often enough. For a single roll of a fair die, the probability is 1/6.

The probability of rolling a 5 on a roll of a single number cube is 1/6 (0.1666) as there is only one number 5 on a total of 6 sides on the cube.

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Since there is only one even prime, 2, the probability of rolling a 2 with one die is 1 in 6.

The probability is 1 out of two. The primes you can roll are 2,3, and 5.

The probability is 5/12.

1 in 6, or 0.17.

The probability of rolling a seven with one roll of a standard number cube is zero.

First you need to work out the probability of rolling a prime number. The prime numbers on a die are 2, 3 and 5. Thus the probability of rolling a prime number is 3/6 which can be simplified to 1/2. The probability of rolling a number greater than 1 is 5/6. The probability of rolling one on one dice and one on the other is therefore 1/2 x 5/6 = 5/12. There are two possible ways round these options could come though. You might get the number greater than one on the first roll, and the prime on the second. Thus we need to multiply the probability by 2, which gives us the final answer of 5/6.

Assuming that "to" should actually be "two", Since the outcome on each die is independent, Pr(Roll a prime when rolling two dice) = Pr(Roll a prime on a die)2 = (1/2)2 = 1/4

"The probability of getting a prime number in a die is 4/6" Actually there are 3 prime numbers on a die. 2, 3, and 5 are all prime numbers. So this tells you that you have 3 chances it will be a prime number and 3 chances it will not be a prime number. So the probability of getting a prime number on a die would be 3/6 or 1/2.

It is 1 (a certainty) if you roll it often enough. For a single roll of a fair die, the probability is 1/6.