1.

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 red or blue?

Answer»

<P>0.35
0.7
0.15
`0.50`

Solution :P(not red or BLUE) `=1-(36^(@)+72^(@))/(360^(@))=1-(108^(@))/(360^(@))`
`=1-(3)/(10)=1-0.3=0.7`
Thus (B) is correct option.


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