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If 75 percent of all Americans own an automobile, 15 percent

Expert replies
by swerve » Mon Sep 10, 2018 11:01 am

Timer

00:00

Answers

A

B

C

D

E

Stats

Difficulty—

If 75 percent of all Americans own an automobile, 15 percent of all Americans own a bicycle, and 20 percent of all Americans own neither an automobile nor a bicycle, what percent of Americans own both an automobile and a bicycle?

A. 0%
B. 1.33%
C. 3.75%
D. 5%
E. 10%

The OA is E.

Source: Princeton Review
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Source: — Problem Solving |

by Jay@ManhattanReview » Mon Sep 10, 2018 10:02 pm
swerve wrote:If 75 percent of all Americans own an automobile, 15 percent of all Americans own a bicycle, and 20 percent of all Americans own neither an automobile nor a bicycle, what percent of Americans own both an automobile and a bicycle?

A. 0%
B. 1.33%
C. 3.75%
D. 5%
E. 10%

The OA is E.

Source: Princeton Review
Given that 20 percent of all Americans own neither an automobile nor a bicycle, we have 100 - 20 = 80% of all Americans who own an automobile or bicycle or both.

=> Automobile owner + Bicycle owner - Owners of both = 80

=> 75 + 15 - Owners of both = 80

Owners of both = 10%.

The correct answer: E

Hope this helps!

-Jay
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swerve wrote:If 75 percent of all Americans own an automobile, 15 percent of all Americans own a bicycle, and 20 percent of all Americans own neither an automobile nor a bicycle, what percent of Americans own both an automobile and a bicycle?

A. 0%
B. 1.33%
C. 3.75%
D. 5%
E. 10%
\[? = x\,\% \]
Trivial application of the simplifier :
\[80 = 75 + 15 - x\,\,\,\,\, \Rightarrow \,\,\,? = 10\,\% \]
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This solution follows the notations and rationale taught in the GMATH method.

Regards,
Fabio.
Fabio Skilnik :: GMATH method creator ( Math for the GMAT)
English-speakers :: https://www.gmath.net
Portuguese-speakers :: https://www.gmath.com.br
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by Scott@TargetTestPrep » Thu Apr 18, 2019 5:42 pm
swerve wrote:If 75 percent of all Americans own an automobile, 15 percent of all Americans own a bicycle, and 20 percent of all Americans own neither an automobile nor a bicycle, what percent of Americans own both an automobile and a bicycle?

A. 0%
B. 1.33%
C. 3.75%
D. 5%
E. 10%

The OA is E.

Source: Princeton Review
We can let the total number of Americans = 100 and create the following equation:

100 = number who own an automobile + number who own a bike - number who own both + number who own neither

100 = 75 + 15 - b + 20

100 = 110 - b

b = 10

Answer: E

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