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 being red or blue?

Options

A. 0.2
B. 0.3
C. 0.1
D. 0.4

Answer

B

Explanation

P(red or blue) = 1 - P(not red or blue) `=1-0.7=0.3`
Thus (b) is correct option.