# Out of $50$ people surveyed in a study, $35$ are smokers, among whom $20$ are males.

Out of $50$ people surveyed in a study, $35$ are smokers, among whom are $20$ males. What is the probability that if the person surveyed is a smoker, then he is a male?

After trying, I came up with this:

probability of being a smoker $= 35/50$

probability of being a smoker who is male $= 20/50$

probability of being male and smoker $= P(B \mid A) = 20/35$

• Are you saying that $20$ of the $35$ people who smoke are male? – N. F. Taussig Apr 17 '18 at 11:59
• Between this and your prior question it looks like you are just posting your homework here for us to do for you. Please edit to show your efforts and to indicate where you are getting stuck. – lulu Apr 17 '18 at 12:01
• Voting to close the question. If you can, please edit to show your efforts. – lulu Apr 17 '18 at 12:15
• Your answer is correct. – N. F. Taussig Apr 17 '18 at 13:48