Q: What is the probability that the sum of two different single-digit prime numbers will NOT be prime?

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If the numbers are 1 to 6, there are three prime numbers in that range, a probability of 50%.

Not really. You just have to try different numbers. As to patterns, the probability of finding a prime goes down for higher numbers. The number of prime numbers up to a number "n" is roughly equal to n / ln(n), where ln() is the natural logarithm function.

It is 1/4.

A prime number is a number in N that has exactly two different numbers in N that divide it: 1 and itself. 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 are the prime numbers from 1 to 50 Probability of prime from 1 to 50 is 15/50 = 3/10 Probability of not prime is the complement = 1- 3/10 = 7/10

The probabiliy of selecting odd or prime numbers from 1 to 50. First find out the probability of selecting odd numbers : 25/50 is 1/2. Lets find out the probability of selecting prime numbers: 15 / 50 . so, total is 40/ 50 is 0.82.

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If the numbers are 1 to 6, there are three prime numbers in that range, a probability of 50%.

The prime numbers from one to nine are 2, 3, 5, and 7. There are nine numbers from one to nine. The probability is 4 (the number of prime numbers) over 9 (the total number of numbers). Therefore, the probability of choosing a prime number is 4/9 or about 44 percent.

The probability is 3 out of 10.

The probability of getting two prime numbers when two numbers are selected at random and without replacement, from 1 to 10 is 2/15.

The probability is 8/20.

The probability of rolling two prime numbers on a standard pair of dice is 1 in 4, or 0.25. Take the probability of rolling a prime on one die, 3 in 6, or 1 in 2, or 0.5, and square it.

Not really. You just have to try different numbers. As to patterns, the probability of finding a prime goes down for higher numbers. The number of prime numbers up to a number "n" is roughly equal to n / ln(n), where ln() is the natural logarithm function.

The probability is approx 0.09. This assumes that J and K are not prime numbers.

"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 1/4.

A prime number is a number in N that has exactly two different numbers in N that divide it: 1 and itself. 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 are the prime numbers from 1 to 50 Probability of prime from 1 to 50 is 15/50 = 3/10 Probability of not prime is the complement = 1- 3/10 = 7/10

It is 0.4