posted by Susie .
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?
Please identify the school subject so we know clearly what it is. Mat means nothing to me, but Math does.
The only prime numbers in that range are 1, 3, 5 and 7. They are all odd, 100%.
Sorry, Assuming you count 1 as a prime number, and 9 is not. 4/5 = 80% If you don't count 1, it is 3/5 = 60%.