I have a question here that just doens\'t make any sense to me.Can someone help?

Question

I have a question here that just doens't make any sense to me.Can someone help? Suppose that a natural number 1 through 11 inclusive isselected at random. What is the probability that the numberselected is even if you know that it is prime? I am super confused. Isn't the only prime number between 1 and11 that is even number 2? Wouldn't this be 1/11? Please help! I have a question here that just doens't make any sense to me.Can someone help? Suppose that a natural number 1 through 11 inclusive isselected at random. What is the probability that the numberselected is even if you know that it is prime? I am super confused. Isn't the only prime number between 1 and11 that is even number 2? Wouldn't this be 1/11? Please help!

Explanation / Answer

Since the number selected is prime, we only consider thosenumbers as possibilities to be picked - we cannot have a compositenumber if we know the number is prime.

Probability is 1/5

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