Concept explainers
In Exercises 1–22, use Bayes’ theorem to calculate the probabilities.
Cars and Income Table 5 gives the distribution of incomes and shows the proportion of two-car families by income level for a certain suburban county. Suppose that a randomly chosen family has two or more cars. What is the probability that its income is at least $75,000 per year?
Table 5 |
||
Annual Family Income |
Proportion of People |
Proportion Having Two or More Cars |
$30,000–$44,999 $45,000–$59,999 $60,000–$74,999
|
.10 .20 .35 .30 .05 |
.20 .50 .60 .75 .90 |
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