Problem Solving

Hi AbeNeedsAnswers,

We're told that Cheryl purchased 5 identical hollow pine doors and 6 identical solid oak doors. The REGULAR price of each solid oak door was TWICE the REGULAR price of each hollow pine door, but Cheryl was given a discount of 25% off the regular price of each solid oak door. The regular price of each hollow pine door was $40. We're asked for the total price of all 11 doors.

As wordy as this prompt is, solving it really comes down to just organizing the given information and doing a bit of arithmetic...

To answer this question, we need to determine the price of the two types of doors:
Regular price of hollow pine door = $40
Regular price of solid oak door = (2)($40) = $80
Discount price of solid oak door = $80 - (.25)($80) = $60

Now that we have the prices, we can figure out the total:
5($40) + 6($60) = $200 + $360 = $560

Final Answer: C

GMAT assassins aren't born, they're made,
Rich

AbeNeedsAnswers wrote:Cheryl purchased 5 identical hollow pine doors and 6 identical solid oak doors for the house she is building. The regular price of each solid oak door was twice the regular price of each hollow pine door. However, Cheryl was given a discount of 25% off the regular price of each solid oak door. If the regular price of each hollow pine door was $40, what was the total price of all 11 doors?

A) $320
B) $540
C) $560
D) $620
E) $680

C

We can let the price of each hollow pine door = d and of each solid oak door = 2d.

Since each pine door = 40, d = 40, and the regular price of each solid oak door is (2)(4) = 80.

With a 25% discount, each solid oak door is 0.75(80) = 60.

So, the six oak doors cost 6 x 60 = 360 dollars, and the five pine doors cost 5 x 40 = 200 dollars. Thus, the total is 560 dollars.

Answer: C