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Re: A Mathematics program was tried out in 2 classes in each of 32 [#permalink]
Expert Reply
Each teacher took at least 1 class; that means that 37 classes are taken and remaining classes 64-37= 27 classes are divided among 37 teachers again.

If 1 class is given to each teacher, 27 can be divided among 27 teachers, making no teacher teaching 3 classes.

But if 2 classes are given to any of the 37 teachers, we can distribute the classes among 27/2= 13.5= 13 teachers.
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