Question

15. In a class, 20 students are 1.15 m tall, 15 students are 1.20 m tall and 5 students are 1.25 m
tall. What is the average height of the students in the class?​

Answer 1

Step-by-step explanation:

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}$$</p><p>=\frac{23 + 18 + 6.25}{40}$

=47.25/40

=1.18125m