SCENARIO 4-2
an Alcohol Awareness Task Force at a Big-Ten

question 148

Short Answer

SCENARIO 4-2
An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm.The following result was obtained. $$\begin{array} { | l | l | l | } \hline & \text { Did Well on Midterm } & \text { Did Poorly on Midterm } \\\hline \text { Studying for Exam } & 80 & 20 \\\hline \text { Went Bar Hopping } & 30 & 70 \\\hline\end{array}$$
-Referring to Scenario 4-2, what is the probability that a randomly selected student who went bar hopping did well on the midterm? a) $30 / 100$ or $30 \%$
b) $30 / 110$ or $27.27 \%$
c) $30 / 200$ or $15 \%$
d) $( 100 / 200 ) ^ { * } ( 110 / 200 )$ or $27.50 \%$

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