Bunuel
Esther bought a computer at a price of p dollars, and she paid a sales tax of t percent. If Esther had less than r dollars left of the $1,000 that she budgeted for the computer, was the price of the computer, excluding the sales tax, greater than $800?
(1) r = 200
(2) t = 6
Esther bought a computer at a price of p dollars, and she paid a sales tax of t percent. If Esther had less than r dollars left of the $1,000\(p[1+\frac{t}{100}] > 1000 - r\)
Constraint: \(0 \leq r \leq 1000\)
Question: Is \(p > $800\)
Statement 1(1) r = 200
\(p[1+\frac{t}{100}] > 1000 - r\)
\(p[1+\frac{t}{100}] > 1000 - 200\)
\(p[1+\frac{t}{100}] > 800\)
We can infer that the cost of the computer, inclusive of the sales tax, is greater than $800. However, we cannot infer whether the cost of the computer exclusive of the sales tax is greater than $800.
Statement 1, alone, is not sufficient to answer the question. Hence, we can eliminate A and D.
Statement 2(2) t = 6
\(p[1+\frac{6}{100}] > 1000 - r\)
\(p[1.06] > 1000 - r\)
Dividing by 1.06 on both sides we get
\(p > 943.39 - 0.943r\)
As the value of r is not known, we cannot comment on whether \(p > 800\). For some value of \(r\) the value of \(p\) can be greater than \(800\), for some other value of \(r\), the cost can be equal to \(800\) (or less)
We can eliminate B.
Combined\(p[1+\frac{6}{100}] > 1000 - 200\)
\(p > \frac{800}{1.06}\)
\(p > $754.71\)
Using the information from Statement 1 and Statement 2, we know that \(p > $754.71\), however we do not know whether\(p > 800\).
Ex:
If p = $760 → Is \(p > $800\) ⇒ The answer is No
If p = $810 → Is \(p > $800\) ⇒ The answer is Yes
As we are getting two different answers, the statements combined don't help.
Option E