Mathematics

Isabel Berry

5 December, 10:05

You have a spinner, shown below. You wish to test its fairness, so you conduct several trials in which you repeatedly spin the spinner and record how many times you come up with a result of violet. Your results are shown in the table next to the spinner.

A spinner with 9 equal sections. The spots are black, red, orange, yellow, green, aqua, blue, purple, white.

Trial

1

2

3

4

Times Spun

85

156

34

127

Times Violet

10

18

2

14

Calculate the experimental probability of your spinner showing a result of violet, written as a percentage to two decimal places.

a.

10.05%

b.

10.95%

c.

11.02%

d.

11.11%