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 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 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 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.
16 Sep 2014, 02:51
Kudos
Bookmarks
A music store has 90 different CDs. If the average (arithmetic mean) price of a CD is $12, and 20 of the most expensive CDs cost $20 each, what is the average (arithmetic mean) price of the remaining CDs?
A. 8.33
B. 8.75
C. 9.23
D. 9.71
E. 10.07
A. 8.33
B. 8.75
C. 9.23
D. 9.71
E. 10.07
16 Sep 2014, 02:51
Kudos
Bookmarks
Official Solution:
A music store has 90 different CDs. If the average (arithmetic mean) price of a CD is $12, and 20 of the most expensive CDs cost $20 each, what is the average (arithmetic mean) price of the remaining CDs?
A. 8.33
B. 8.75
C. 9.23
D. 9.71
E. 10.07
The total cost of all CDs is \(90*$12 = $1,080\).
The total cost of the 20 most expensive CDs is $400. Subtracting this from the total, we have \($1,080 - $400 = $680\) allocated for the remaining 70 CDs. Hence, the average price of these CDs is \(\frac{$680}{70} = $9.71\).
Answer: D
A music store has 90 different CDs. If the average (arithmetic mean) price of a CD is $12, and 20 of the most expensive CDs cost $20 each, what is the average (arithmetic mean) price of the remaining CDs?
A. 8.33
B. 8.75
C. 9.23
D. 9.71
E. 10.07
The total cost of all CDs is \(90*$12 = $1,080\).
The total cost of the 20 most expensive CDs is $400. Subtracting this from the total, we have \($1,080 - $400 = $680\) allocated for the remaining 70 CDs. Hence, the average price of these CDs is \(\frac{$680}{70} = $9.71\).
Answer: D
23 Oct 2023, 03:17
Kudos
Bookmarks
I've revised the question and solution, incorporating additional details for improved clarity. I trust this makes it more comprehensible.
