Find the probability.
A number picked at random from the numbers 1 through 15 is prime.
There are 6 prime numbers between 1 and 15: 2, 3, 5, 7, 11, and 13. Therefore, the probability of picking a prime number at random from the numbers 1 through 15 is 6/15 or 2/5.
Answer: 2/5
To find the probability of picking a prime number at random from the numbers 1 through 15, we need to determine the number of prime numbers in that range and divide it by the total number of numbers.
The prime numbers between 1 and 15 are 2, 3, 5, 7, 11, and 13. So, there are a total of 6 prime numbers in the range.
The total number of numbers between 1 and 15 is 15.
To find the probability, we divide the number of outcomes where we get a prime number by the total number of possible outcomes:
Probability = Number of prime numbers / Total number of numbers
Probability = 6 / 15
Probability = 2 / 5
Therefore, the probability of picking a prime number at random from the numbers 1 through 15 is 2/5 or 40%.