A survey was taken at a high school, and the results were put in a circle graph. The students were asked to list their favourite colours. The measurement of each central angle is shown. If a person is chosen at random from the school, find the probability of each response.

What is the probability of favourite colour not being orange or green ?

Options

A. 0.65
B. 0.75
C. 0.25
D. `0.50`

Answer

D

Explanation

P(not orange or green) = 1 - P(orange or green)
`=1-(144^(@)+36^(@))/(360^(@))=1-(180^(@))/(360^(@))=1-(1)/(2)=0.5`
Thus (d) is correct option.