Question 824594: what is the probability of getting a non prime number between 1 to 25 if the number is chosen randomly?
Answer by KMST(5328)   (Show Source):
You can put this solution on YOUR website! Of all 25 numbers,
number 1, is not a prime number;
numbers 2, 3, 5, 7, 11, 13, 17, 19, and 23 are prime numbers,
and the rest are composite numbers.
Counting the prime numbers listed above, we find that there are 9 of them.
The remaining numbers,
 ,
are not prime.
As any number is equally likely to be picked when chosen randomly,
 of the times a non-prime would be chosen.
The probability of getting a non prime number between 1 to 25 if the number is chosen randomly is 
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