Question

In a school, there are 450 students in Year 1, 225 students in Year 2, 475 students in Year 3, and 650 year 4. 1) if you have to draw a pie chart how many categories you will have? 2) what is measure of the angles for the students in year 1?

Answer 1

1) 4 categories

2) The measure of the angle for the students in year 1 is 90º.

Explanation:

1) if you have to draw a pie chart how many categories you will have?

For each year, a category. There are students for Year 1, Year 2, Year 3 and Year 4. So the pie chart would have 4 categories.

2) what is measure of the angles for the students in year 1?​

Find the relative frequency of students in year 1, and then multiply by 360. So

450 students in Year 1.

450 + 225 + 475 + 650 = 1800 total students

450/1800 = 0.25

0.25*360 = 90º

The measure of the angle for the students in year 1 is 90º.