Ramanujan Primary School has 1200 students. Each class has 30 students. Each student takes 5 sessions a day and each teacher teaches 4 sessions a day. What is the minimum number of teachers in the School?

Solution

There are $$\frac{1200}{30} = 40$$ classes, and each class needs 5 sessions a day, so $$40 \times 5 = 200$$ sessions must be taught daily. Since one teacher handles 4 sessions a day, at least $$\frac{200}{4} = 50$$ teachers are needed.

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