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Assuming you mean the sum of the two dice is a Prime number, then:
The possible outcomes are 2, 3, 5, 7, 11 which occur 1, 2, 4, 7, 2 times respectively.
There are 36 possible outcomes
→ pr(prime_sum) = (1+2+4+7+2)/36 = 16/36 = 4/9
If you mean that both dice must show a prime number, then:
The possible primes are 2, 3, 5 → probability of 1 die showing a prime number is 3/6 = ½
→ probability both show a prime number is ½ × ½ = ¼
If you mean either or both dice could show a prime number, then:
The possible primes are 2, 3, 5 → probability of 1 die showing a primes is 3/6 = ½
→ probability of a die not showing a prime is 1 - ½ = ½
→ probability of neither die showing a prime is ½ × ½ = ¼
→ probability of either or both dice show a prime is 1 - ¼ = ¾
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When rolling two dice what are the odds of rolling both even numbers?
The probability of rolling two even numbers on two standard dice is 0.52, or 0.25.
When rolling five dice what is the probability that all 5 dice will be the same number?
The probability of rolling the same number on five dice is (1/6)4, or about 0.0007716.
What is the probability of rolling a sum of 11 with 2 dice?
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
What is the probability of rolling a 7 or 11 with two dice?
The probability of rolling a 7 with 2 dice is 6/36; probability of rolling an 11 is 2/36. Add the two together to find probability of rolling a 7 or 11 which is 8/36 or 2/9.
What is the probability of getting 4 dots on top in rolling two dice?
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.
