A technician makes a round-trip to and from a certain service center by the same route. If the technician completes

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BTGmoderatorDC: Moderator; Posts: 7187; Joined: Thu Sep 07, 2017 4:43 pmFollowed by: 23 members

by BTGmoderatorDC » Mon May 03, 2021 3:23 pm

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A technician makes a round-trip to and from a certain service center by the same route. If the technician completes the drive to the center and then completes 10 percent of the drive from the center, what percent of the round-trip has the technician completed?

A) 5%
B) 10%
C) 25%
D) 40%
E) 55%

OA E

Source: Official Guide

Source: Beat The GMAT — Problem Solving | Mon May 03, 2021 3:23 pm

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Re: A technician makes a round-trip to and from a certain service center by the same route. If the technician completes

by Brent@GMATPrepNow » Wed May 05, 2021 6:47 am

BTGmoderatorDC wrote: ↑
Mon May 03, 2021 3:23 pm
A technician makes a round-trip to and from a certain service center by the same route. If the technician completes the drive to the center and then completes 10 percent of the drive from the center, what percent of the round-trip has the technician completed?

A) 5%
B) 10%
C) 25%
D) 40%
E) 55%

OA E

Source: Official Guide

Always check the answer choices before you do ANY work.

The complete round trip consists of driving to the service center and then back home again.
So, once the technician drives to the service center he/she has already competed 50% of the entire trip.
Since the technician completes a portion of the trip back home, the correct answer must be greater than 50%
Only one answer choice works.
Answer: E

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