A Sociologist Studying Freshmen Carried Out a Survey, Asking (Among

Multiple Choice

A sociologist studying freshmen carried out a survey, asking (among other questions) how often students went out per week, how many hours they studied per day, and how many hours they slept at night. The table below provides the answers on the time slept and the time spent studying. What proportion, among the students who slept more than 8 hours, studied 4 hours or more?

A) 0.2
B) 0.1
C) 0.17
D) 0.25