Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2212:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2301:30 AM EDT
-02:30 AM EDT
Struggling with GMAT Verbal as a non-native speaker? Harsh improved his score from 595 to 695 in just 45 days—and scored a 99 %ile in Verbal (V88)! Learn how smart strategy, clarity, and guided prep helped him gain 100 points.
Apr 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
09 Aug 2023, 12:00
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
86% (01:24) correct
14%
(01:38)
wrong
based on 529
sessions
History
Date
Time
Result
Not Attempted Yet
In a set of 5 measurements with an average (arithmetic mean) of 60, one of the measurements is found to be incorrect. If this measurement is replaced by its correct value of 80, then the average of the resulting set is 70. What is the value of the incorrect measurement?
A. 10
B. 20
C. 25
D. 30
E. 50
A. 10
B. 20
C. 25
D. 30
E. 50
Pro tip:
Combine official questions for familiarity with GMAT Club Tests for analytics and tougher Focus-level practice so the real exam feels manageable.
Explore →
09 Aug 2023, 21:50
Kudos
Bookmarks
Bunuel
We see that the addition of one term moves the average from 60 to 70, thereby causing the average to increase by 10 points.
As there are five elements in the set, the total of the set would have increased by \(10*5 = 50\) points to cause this shift.
Hence, we can infer that the new value, i.e. 80 contributed to 50 points over the original value.
Original Value = \(80 - 50 = 30\)
Option D
15 Aug 2023, 14:12
Kudos
Bookmarks
Bunuel
average = sum of terms/number of terms
number of terms = 5
incorrect average = 60
sum of terms with one incorrect measurement = 5(60) = 300
If x is the incorrect measurement, we have:
sum of terms with correct measurements = 300 – x + 80 = 380 – x
Since the correct average is 70, we have:
(380 – x)/5 = 70
380 – x = 350
x = 30
Answer: D
