The prime numbers between 1 and 15 are: 2, 3, 5, 7, 11, and 13. There are 6 prime numbers out of a total of 15 numbers, so the probability is:
$$ \frac{6}{15}=\boxed{\frac{2}{5}} $$
Find the probability of a number picked at random from the numbers 1 through 15 that is prime.
1 answer