<human>:  At Roosevelt high school there are 600 students in the senior class. A fifth of the students are in the marching band. Of the students in the marching band, half of them play a brass instrument. Of the students that play a brass instrument, a fifth of them play the saxophone. Of the students that play the saxophone, a third of them play the alto saxophone. How many students play the alto saxophone?
<bot>: How many students are in the marching band? ** The number of students in the marching band is 600 / 5 = <<600/5=120>>120 students
How many students play a brass instrument? ** The number of students that play a brass instrument is 120 / 2 = <<120/2=60>>60 students
How many students play the saxophone? ** The number of students that play the saxophone is 60 / 5 = <<60/5=12>>12 students
How many students play the alto saxophone? ** The number of students that play the alto saxophone is 12 / 3 = <<12/3=4>>4 students
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