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 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.
31 Jan 2023, 10:15
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
62% (01:31) correct
38%
(01:39)
wrong
based on 55
sessions
History
Date
Time
Result
Not Attempted Yet
What is the average (arithmetic mean) of 10 consecutive integers?
(1) The average (arithmetic mean) of the first 7 integers is 7.
(2) The average (arithmetic mean) of the last 7 integers is 10.
(1) The average (arithmetic mean) of the first 7 integers is 7.
(2) The average (arithmetic mean) of the last 7 integers is 10.
01 Feb 2023, 00:51
Kudos
Bookmarks
Bunuel
Solution:
Pre Analysis:
- We are asked the average of 10 consecutive integers
- Let the 10 consecutive integers be \(a, a+1, a+2, a+3....., a+8, a+9\)
- So, average of the same \(=\frac{a+a+1+a+2+a+3+...+a+8+a+9}{10}=\frac{10a+45}{10}=a+4.5\)
- Thus to get the answer we need the value of \(a\)
Statement 1: The average (arithmetic mean) of the first 7 integers is 7
- According to this statement, \(\frac{a+a+1+a+2+a+3....+a+6}{7}=7\)
- Using the above equation we can easily get the value of \(a\)
- Thus, statement 1 alone is sufficient and we can eliminate options B, C and E
Statement 2: The average (arithmetic mean) of the last 7 integers is 10
- According to this statement, \(\frac{a+3+a+4+a+5+a+6....+a+9}{7}=10\)
- Using the above equation we can easily get the value of \(a\)
- Thus, statement 2 alone is also sufficient
Hence the right answer is Option D
Moderators:
