Question

the percent of college students marijuana use for a sample of 93,818 students is shown in the accompanying pie chart. find the probability of each event listed in parts (a) through (d) below.
click the icon to view the pie chart.
(a) randomly selecting a student who never used marijuana
the probability is 53.3 %
(round to one decimal place as needed.)
(b) randomly selecting a student who used marijuana
the probability is 46.7 %
(round to one decimal place as needed.)
(c) randomly selecting a student who used marijuana between 1 and 29 of the last 30 days
the probability is 17.0 %
(round to one decimal place as needed.)
(d) randomly selecting a student who used marijuana on at least 1 of the last 30 days
the probability is %
(round to one decimal place as needed.)

Explanation:

Step1: Identify relevant percentages

The percentages for using marijuana \(1 - 9\) days (\(12.0\%\)), \(10 - 29\) days (\(5.0\%\)), and \(30\) days (\(2.7\%\)) are relevant.

Step2: Sum the percentages

$$12.0\%+5.0\% + 2.7\%=\frac{12.0 + 5.0+2.7}{1}\%=19.7\%$$

Answer:

\(19.7\)