Lesson: Data Sufficiency Challenging - 17t05
Easy Math/Tough Applications: Example 2
A home owner must pick between carpet A, which costs
$6.00 per square foot, and carpet B, which costs $4.50
per square foot. If the home owner must pay the installer the
same rate regardless of which carpet is used, which of the two
carpets will be cheaper to install?
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1) Carpet B takes one-third longer to install than
carpet A.
2) Labor costs are $20 per hour.
The total cost depends of the cost of
the carpet, area, installation rate, and
.
1) Carpet B takes one-third
longer to install than carpet A.
| |
 |
Sufficient |
 |
Insufficient |
|
|
2) Labor costs are $20 per hour.
| |
|
Sufficient |
|
Insufficient |
|
|
Countinue
This might have gotten you if you forgot that
what we need is the time, not the hourly rate, which we know from the
stem is the same for both. Statement (2) alone does not tell us that both
A and B would take the same amount of time to install. Maybe
A is a snap to lay down and B is a real hassle, so this
statement is insufficient to tell us which carpet will be more expensive
overall.
Now we have to consider the two statements in
combination.
Countinue
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