Answer:
Option B.
Explanation:
The given table represents the a survey taken of computer shoppers.
We need to find the percent of the shoppers who were not previous owners of a computer.
Relative frequency show the percentage of each type of previous ownership (None, Windows, Macintosh).
From the given table it is clear that
Relative frequency of None = 0.17 = 17%
Relative frequency of Windows = 0.12 = 12%
Relative frequency of Macintosh = 0.71 = 71%
17% of the shoppers were not previous owners of a computer.
Therefore, the correct option is B.