A survey of automobiles parked in student and staff lots at a large university classified the brands by country of origin,as seen in the table.
What is the marginal distribution of origin?
A)52% North American,13% European,35% Asian
B)56% North American,10% European,34% Asian
C)54% Students,46% Staff
D)107% North American,16% European,54% Asian
E)48% North American,16% European,36% Asian

Question

A survey of automobiles parked in student and staff lots at a large university classified the brands by country of origin,as seen in the table. 
What is the marginal distribution of origin?
A)52% North American,13% European,35% Asian 
B)56% North American,10% European,34% Asian 
C)54% Students,46% Staff 
D)107% North American,16% European,54% Asian 
E)48% North American,16% European,36% Asian

Quizplus · Accepted Answer

The marginal distribution of origin is the total percentage of each region regardless of whether it is students or staff. Adding up the percentages in the table, we get 52% North American (29% + 23%), 13% European, and 35% Asian (16% + 19%). Therefore, the best choice is A as it matches these percentages.

A Survey of Automobiles Parked in Student and Staff Lots