About month ago I smoked marijuana it was my first time smoking. I only had 3 hits no more or no less. What's the chance of it showing up in a hair analysis drug test. I don't know if it matters but I run, drink water regularly, and work out 5 days a week. My body weight is about 160 and I have a decently fast metabolism. Any answers would help.

It is extremely unlikely that single cannabis use would be detected in a hair test. See Musshoff & Madea (2006)

Three hits will show up in your hair test, but only in a small amount. Most drug testing has an allowable amount that it dismisses. I suggest that you wash your hair with a product called aloe rid and STOP SMOKING POT! It has been proven to a multitude of problems both physically and mentally. It will remain in your hair for about three months, depending on how long your hair is. It is out of your system in about a week (for urine tests)