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There are eight prime numbers between 1 and 20.
2, 3, 5, 7, 11, 13, 17, 19

If you randomly choose in number then you have an 8 in 20 chance of selecting a prime.

The probability is selecting a Prime number is 8/20 or 0.4

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What is the probability of picking a prime number from numbers between 1 and 20?

The probability is 8/20.


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A number is chosen at random from the first 20 positive whole numbers What is the probability that it is not a prime number?

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What is the probability that a random selected number from 20 to 30 is divisible by 3 and then divisible by 12 after replacing first?

To find the probability of selecting a number from 20 to 30 that is divisible by 3, we first identify the numbers in that range: 21, 24, 27, and 30. There are four suitable candidates, so the probability of selecting one of them is 4 out of 11 (the total numbers from 20 to 30, inclusive). After replacing the selected number, we check which of these are divisible by 12. Among the numbers listed, only 24 is divisible by 12. Therefore, the probability of selecting a number divisible by 3 and then finding it divisible by 12 is 1 out of 11, which simplifies to approximately 0.0909 or 9.09%.


You selecting a number from the numbers 1-20. What is the probability the number you select is a factor of 20?

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What is the probability of getting 2 prime nos from 1 to 20?

In the sample space [1,20], there are 8 prime numbers, [2,3,5,7,11,13,17,19]. The probability, then, of randomly choosing a prime number in the sample space [1,20] is (8 in 20), or (2 in 5), or 0.4. The probability of choosing two of them is (8 in 20) times (7 in 19) which is (56 in 1064) or (7 in 133) or about 0.05263.


What is the probability to choose a prime number from 1 to 20?

In this problem, the total number of possibilities is 20, so n = 20.The set of prime numbers from 1 to 20 = {2, 3, 5, 7, 11, 13, 17, 19}, so f = 8Probability = f/n = 8/20 = 0.4.You have a 2 in 5 chance of choosing a prime number from 1 to 20.


If a number is chosen at random from the numbers 1 to 20 inclusive what is the probability that an even number will be picked?

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