31%.
The car bought most often by both males and females collectively is the white car. That has a total frequency of 0.31 out of 1 or, 31/100
The common ratio is -5, note that each value is the previous value multiplied by -5.
Answer:
See the diagram.
Step-by-step explanation:
represents a circular disc with centre
and radius 
I think the answer would be A.150