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Although there are infinitely many primes, they become rarer and rarer so that as the number of numbers increases, the probability that picking one of them at random is a Prime number tends to zero*.
In the first 10 numbers there are 4 primes, so the probability of picking one is 4/10 = 2/5 = 0.4
In the first 100 numbers there are 26 primes, so the probability of picking one is 25/100 = 1/4 = 0.25
In the first 1,000 numbers there are 169 primes, so the probability of picking one is 168/1000 = 0.168
In the first 10,000 numbers there are 1,229 primes, so the probability of picking one is 0.1229
In the first 100,000 numbers there are 9592 primes, so the probability of picking one is 0.09592
In the first 1,000,000 numbers there are 78,498 primes, so the probability of picking one is 0.078498
In the first 10,000,000 numbers there are 664,579 primes, so the probability of picking one is 0.0664579
* Given any small value ε less than 1 and greater than 0, it is possible to find a number n such that the probability of picking a prime at random from the numbers 1-n is less than the given small value ε.
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A fair die is thrown What is the probability that a prime number will occur?
When a fair die is thrown the probability that a prime number will occur is 2:1
What are odds of throwing a prime number with a dice?
The probability of eventually throwing a prime number is 1. On a single throw, of a fair die, the probability is 1/2.
What is the probability a prime number will show up on a number cube?
33%
What is the probability of picking a prime number from numbers between 1 and 20?
The probability is 8/20.
What is the probability of choosing a letter from the word probability?
Since the word "probability" contains only letters, then the probability of choosing a letter from the word "probability" is 1, i.e. it is certain to happen.
