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

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Vincen: Legendary Member; Posts: 2898; Joined: Thu Sep 07, 2017 2:49 pmFollowed by: 5 members; Thanked: 6 times

by Vincen » Sun Apr 25, 2021 10:42 am

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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%

Answer: E

Source: Official Guide

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Source: Beat The GMAT — Problem Solving | Sun Apr 25, 2021 10:42 am

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

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 » Fri May 21, 2021 7:12 am

Vincen wrote: ↑
Sun Apr 25, 2021 10:42 am
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%

Answer: 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

Brent Hanneson - Creator of GMATPrepNow.com

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