Keegan is in school for 7.5 hours each day and he is taking 7 classes. He has history and chemistry classes for a combined total of 1.5 hours. How many minutes does Keegan spend in one of his other classes on average?
He has 7-2=<<7-2=5>>5 other classes
7.5 hours - 1.5 hours = <<7.5-1.5=6>>6 hours
6 hours = <<6*60=360>>360 minutes
360/5 = <<360/5=72>>72 minutes
Keegan spends 72 minutes in one of his other classes.
#### 72