Question

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?

a) 1.20 m
b) 1.22 m
c) 1.23 m
d) 1.25 m

Answer 1

To find the average height of the students in the class, you need to calculate the mean by dividing the sum of the heights by the total number of students.

Step-by-step explanation:

To find the average height of the students in the class, you need to calculate the mean by dividing the sum of the heights by the total number of students.

First, multiply the height of each group of students by the number of students in that group:

• 20 students x 1.15 m = 23.0 m
• 15 students x 1.20 m = 18.0 m
• 5 students x 1.25 m = 6.25 m

Now, add up the heights:

• 23.0 m + 18.0 m + 6.25 m = 47.25 m

Finally, divide the sum by the total number of students:

• 47.25 m / 40 students = 1.18 m

Therefore, the average height of the students in the class is 1.18 m.