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
the probability is %
(round to one decimal place as needed.)

Explanation:

Step1: Identify relevant percentages

From the pie - chart, the percentage of students who used marijuana 1 - 9 days is \(12.0\%\) and the percentage of students who used marijuana 10 - 29 days is \(5.0\%\).

Step2: Calculate the probability

To find the probability of a student who used marijuana between 1 and 29 days, we add the two relevant percentages. Let \(P\) be the probability. Then \(P=12.0\% + 5.0\%\).

$$P=(12 + 5)\%=17.0\%$$

Answer:

\(17.0\%\)