Question

The circle graph shows the percent of people in a certain country with the various types of blood. If one person from this country is selected at random, use the graph to determine the odds in favor of the person having either O+ or O− blood.

Answer 1

First, we have to know the probability of a person having either O positive or O negative.

`\frac{PercentofO^+}{\text{Total Percent}}+\frac{PercentofO^-}{Total\text{ Percent}}`
`\begin{gathered} =(39)/(100)+(7)/(100) \\ =(46)/(100) \\ =(23)/(50) \end{gathered}`

Now let us solve for the odds

`\text{Odds}=(probability)/(1-probability)`