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 or went bar hopping the weekend before the midterm?
A) 30/200 or 15%
B) (80+30) /200 or (30+80) /200 or 55%
C) (30+70) /200 or (70+30) /200 or 50%
D) (80+30+70) /200 or (110+100-30) /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 or went bar hopping the weekend before the midterm?
A) 30/200 or 15% 
B) (80+30) /200 or (30+80) /200 or 55% 
C) (30+70) /200 or (70+30) /200 or 50% 
D) (80+30+70) /200 or (110+100-30) /200 or 90%

Quizplus · Accepted Answer

The probability of a student doing well on the Midterm or going bar hopping is calculated by adding the probabilities of each event and subtracting the probability of both events occurring together.

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