The price per share of Stock X increased by 10 percent over the same time period that the price per share of Stock Y decreased by 10 percent. The reduced price per share of Stock Y was what percent of the original price per share of Stock X ?
(1) The increased price per share of Stock X was equal to the original price per share of Stock Y.
(2) The increase in the price per share of Stock X was 10/11 the decrease in the price per share of Stock Y.
OA D
Source: Official Guide
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
The price per share of Stock X increased by 10 percent over
This topic has expert replies
-
BTGmoderatorDC
- Moderator
- Posts: 7187
- Joined: Thu Sep 07, 2017 4:43 pm
- Followed by:23 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
Given
\(1.1x\)
\(0.9y\)
\(\frac{0.9y}{x}\cdot 100 = ¿?\)
THE KEY: This is a COMBO QUESTION \(\Rightarrow\) Knowing \(\frac{y}{x}\) (or knowing that you have sufficient information to know \(\frac{y}{x}\)) is sufficient.
Statement 1:
\(1.1x = y\,\Rightarrow\,\frac{y}{x}=1.1\). Sufficient.
Statement 2:
\(0.1x = \frac{10}{11}\cdot 0.1y\,\Rightarrow\,\frac{y}{x}=1.1\). Sufficient.
Note the difference between:
- the increase IN THE price of \(x \,\Rightarrow\, 0.1x\)
- the decrease IN THE price of \(y \,\Rightarrow\, 0.1y\)
- the INCREASED price in \(x \,\Rightarrow\, 1.1x\)
- the DECREASED price in \(y \,\Rightarrow\, 0.9y\).
Therefore, __D__ is the correct option.
\(1.1x\)
\(0.9y\)
\(\frac{0.9y}{x}\cdot 100 = ¿?\)
THE KEY: This is a COMBO QUESTION \(\Rightarrow\) Knowing \(\frac{y}{x}\) (or knowing that you have sufficient information to know \(\frac{y}{x}\)) is sufficient.
Statement 1:
\(1.1x = y\,\Rightarrow\,\frac{y}{x}=1.1\). Sufficient.
Statement 2:
\(0.1x = \frac{10}{11}\cdot 0.1y\,\Rightarrow\,\frac{y}{x}=1.1\). Sufficient.
Note the difference between:
- the increase IN THE price of \(x \,\Rightarrow\, 0.1x\)
- the decrease IN THE price of \(y \,\Rightarrow\, 0.1y\)
- the INCREASED price in \(x \,\Rightarrow\, 1.1x\)
- the DECREASED price in \(y \,\Rightarrow\, 0.9y\).
Therefore, __D__ is the correct option.
