Question

in a class,20 student are 1.15 m tall ,15 student are 1.20m tall and 5 student are 1.25m tall. what is the average hight of the student in the class

Answer 1

Given
Height of 20 students =1.15m
Height of 15 students =1.20m
Height of 5 students=1.25m


Average height =
$\frac{20 \times 1.15 + 15 \times 1.20 + 1.25 \times 5}{20 + 15 + 5}$
=
$\frac{23 + 18 + 6.25}{40}$
=47.25/40

=1.18125m


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Answer 2

Average high of student in the class = 1.15 to 1.25