Is it permissible to ride the musical hymns bus on trips for the Quran Study Center?

It is not permissible to listen to anasheed that contain music. However, it is not forbidden to ride in a bus belonging to a Quran teaching center even if they play anasheed with music, as long as you do not intentionally listen to those musical anasheed. You should advise the officials and explain the impermissibility of such anasheed.