A professor divided the students in her business class into three groups: those who have never taken a statistics class, those who have taken only one semester of a statistics class, and those who have taken two or more semesters of statistics.The professor randomly assigns students to groups of three to work on a project for the course.
If 65% of the students have never taken a statistics class, 15% have taken only one semester of a statistics class, and the rest have taken two or more semesters of statistics, what is the probability that the first groupmate you meet has studied at least two semesters of statistics?
A)0.85
B)0.35
C)0.15
D)0.80
E)0.20

Question

Quizplus · Accepted Answer

The percentage of students who have taken two or more semesters of statistics is 100% - 65% - 15% = 20%. Therefore, the probability that the first groupmate you meet has studied at least two semesters of statistics is 0.20 or 20%.

A Professor Divided the Students in Her Business Class into Three