Choice E: In the second chart, the percentage revenue from computers
in 2010 is roughly equal to the percentage revenue from computers in- In the first chart, you know the total revenue in 2010 was less than
in 2009. Thus the revenue from computers in 2010 is an equal slice of a
smaller whole (relative to 2009). Eliminate Choice E. The correct answer
for Question 2, therefore, is choices A and C.
■ Principle 4: Link to what you know. Since these questions test mathematical
skills covered in previous chapters, you should recall the relevant properties
that a question is addressing. For example, Question 3 requires you to use
the average formula twice. Since the total revenues for 2006 and 2007 are
roughly equal ($78 million), and the percentage revenues from phones
during those two years are roughly equal (30%), the total for those two years
is approximately $78 million × 30% × 2 = $46.8 million. The other data point
is the revenue from phones in 2008. The percentage revenue from phones
in 2008 is roughly 32%, and the total revenue is roughly $63 million. Thus
the revenue from phones in 2008 is approximately $63 million × 32% =
$20.16 million. The total average is approximately $46.8 million + $20.16 million 3
= $22,320,000. Rounding off to the nearest $100,000 gives an answer of
$22,300,000.
CHAPTER 14 ■ DATA INTERPRETATION 45304-GRE-Test-2018_313-462.indd 453 12/05/17 12:07 pm