I took approx 3 hits of marijuana approx 25 days ago. Before that, I had not smoked in years. Unfortunately, I was given an unexpected hair test for a new job today. I am very active, working out (both cardio and weights) several times a week.

Additionally, the hair sample was collected form under my arm and she left approx an inch/inch and a half of growth from the root.

Is there a decent change I will pass the test?

I took approx 3 hits of marijuana approx 25 days ago. Before that, I had not smoked in years. Unfortunately, I was given an unexpected hair test for a new job today. I am very active, working out (both cardio and weights) several times a week.

Additionally, the hair sample was collected form under my arm and she left approx an inch/inch and a half of growth from the root.

Is there a decent change I will pass the test?

More than that... there is little chance that you could fail. In order for cannabis metabolites, either THC or THC-COOH to register on a hair drug test (HDT) requires sustained use over a significant period. HDT is not an effective method for detecting infrequent cannabis use.

Musshoff F, Madea B. (2006) Review of biologic matrices (urine, blood, hair) as indicators of recent or ongoing cannabis use (http://www.ncbi.nlm.nih.gov/pubmed/16628124). There Drug Monit. Apr 2006;28(2):155-63