A researcher at a large university wanted to investigate it a student\'s seat pr

Question

A researcher at a large university wanted to investigate it a student's seat preference was related in any way to the gender of the student. The researcher divided the lecture room into three sections (1-front, middle of the room, 2-front, sides of the classroom, and 3-back of the classroom, both middle and sides and noted where his students sat on a particular day of the class. The researcher's summary table is provided below. What proportion of the class were either males or sitting in the back of the classroom? The manager of a used car lot took inventory of the automobiles on his lot and constructed the following table based on the age of his car and its make (foreign or domestic) If a car were randomly selected from the lot, what is the probability that it is either a car or less than 3 years old?

Explanation / Answer

Sol:

males=20+9+4

back of classrom=Area 3=4+15

4 common take once only

20+9+4+15=48

total=72

proportion of males or sitting in back=48/72

optionC

Solution2:

foforign car=41

les than 3 years=41+43=84

41 repeats twice take once

p(foreign or less than 3 yrs old)=41+43=84/200

probability=84/200

optionB

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