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.
-Referring to Scenario 4-2, what is the probability that a randomly selected student did well on the
Midterm and also went bar hopping the weekend before the midterm?
A) 30/200 or 15%
B) (80+30) /200 or 55%
C) (30+70) /200 or 50%
D) (80+30+70) /200 or 90%

Question

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. 
-Referring to Scenario 4-2, what is the probability that a randomly selected student did well on the
Midterm and also went bar hopping the weekend before the midterm?
A) 30/200 or 15% 
B) (80+30) /200 or 55% 
C) (30+70) /200 or 50% 
D) (80+30+70) /200 or 90%

Quizplus · Accepted Answer

The probability is calculated by dividing the number of students who did well on the Midterm and also went bar hopping (30) by the total number of students (200).

SCENARIO 4-2 An Alcohol Awareness Task Force at a Big-Ten University Sampled