While taking a certain standardized exam, Dave has 20 minutes to finish his 600-word essay. Over the first 10 minutes,

Expert replies

Previous Topic Next Topic

VJesus12: Legendary Member; Posts: 2276; Joined: Sat Oct 14, 2017 6:10 amFollowed by: 3 members

by VJesus12 » Tue Aug 18, 2020 8:36 am

Timer

00:00

Your answer

Difficulty–

right wrong

Pick an answer to see how members did

While taking a certain standardized exam, Dave has 20 minutes to finish his 600-word essay. Over the first 10 minutes, he averages 15 words per minute. By what percent must he increase his average words per minute to finish his essay in the remaining time?

A. 75%
B. 100%
C. 150%
D. 200%
E. 300%

Answer: D

Source: Veritas Prep

Source: Beat The GMAT — Problem Solving | Tue Aug 18, 2020 8:36 am

GMAT/MBA Expert

Scott@TargetTestPrep: GMAT Instructor; Posts: 8246; Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members; Location: Los Angeles, CA; Thanked: 43 times

Re: While taking a certain standardized exam, Dave has 20 minutes to finish his 600-word essay. Over the first 10 minute

by Scott@TargetTestPrep » Sat Aug 22, 2020 8:48 am

VJesus12 wrote: ↑
Tue Aug 18, 2020 8:36 am
While taking a certain standardized exam, Dave has 20 minutes to finish his 600-word essay. Over the first 10 minutes, he averages 15 words per minute. By what percent must he increase his average words per minute to finish his essay in the remaining time?

A. 75%
B. 100%
C. 150%
D. 200%
E. 300%

Answer: D

Solution:

We are given that Dave needs to complete an essay in 20 minutes. Over the first 10 minutes, he averages 15 words per minute and thus competes 10 x 15 = 150 words, which means he has 600 - 150 = 450 words to complete in 10 minutes. That means he needs to average 450/10 = 45 words per minute in the last 10 minutes. We need to determine by what percentage his rate must increase to finish the essay on time. We can let x = the percentage increase and create the following equation to determine x:

15(1 + x/100) = 45

1 + x/100 = 3

x/100 = 2

x = 200

Answer: D

Scott Woodbury-Stewart
Founder and CEO
[email protected]

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

Featured schoolRound 2 closes Jan 7, 2027 54 days left

Chicago Booth

Since 1982, 10 Booth faculty members have received the Nobel Prize in Economic Sciences, more than any other business school.

#3
U.S. News rank: $175,000
Median base salary: 670
Average GMAT Focus: 635
Students in the class

Apply to Booth Visit chicagobooth.edu See the full profile

Photo: Warren LeMay, CC BY-SA 2.0

GMAT Course Reviews

563 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (563 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review