Average height

The average height of all pupils is 162 cm. The class teacher's height is 178 cm. The average height of all (teacher and all pupils) is 163 cm. Calculate the number of pupils in the class.

Correct answer:

n =  15

Step-by-step explanation:


n•162 + 178 = 163•(n+1)

n = 15

Our simple equation calculator calculates it.



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