First of all, regardless of the condition of having at least one female classmate, there are a (3 3,7 7) = 2 10/0 schemes * *;

Then consider the number of schemes that do not meet at least one female student, that is, the number of schemes that are all male, that is, A (3 3,4) = 24, so the number of schemes to be found is 2 10-24= 186.