Question

let n be a randomly selected number between 1 and 40. find... probability.

n is prime given that it's even.

So far, ive figured out that 2 is the only prime # between 1 and 40 and there are a total of 13 primes between 1 and 40.
Is that correct? Or does something else factor into the answer?

Answer 1

1/13 is what i got...

Answer 2

or is it 1/20

Answer 3

what is the probability that it is even? given that it is even, what is the probability that it is 2?

Answer 4

1/13 is wrong.

Answer 5

what is your sample set? and what is the set of expected output?