Imbalance in Honors Class

I return to the classroom tomorrow, in coed classrooms.  In reviewing my class list, I noticed that in my honors course, 7 of the 25 students are male in one class and 8 out of 28 are male in the other class.  My regular classes have 5 out of 16 males and 3 out of 13 males.  Overall, this is the AVID team, so there may be some criteria for being on the team itself.  If this were the case, then it might mirror national stats about overall achievement and success of males in school.  If this isn't the case, then what brought out such an imbalance?  Random computer function?