Suppose that a natural number from 1 through 9 is selected at random. What is the probabiliy that the number selected is odd if you know that it is prime?
To find the probability that the number selected is odd, given that it is prime, we need to determine the number of prime numbers from 1 through 9 and then calculate the number of odd prime numbers.
The prime numbers from 1 through 9 are: 2, 3, 5, 7.
Out of these prime numbers, the odd prime numbers are: 3, 5, 7.
Therefore, the probability that the selected number is odd, given that it is prime, is 3/4 or 0.75 (or 75%).