GRE Prep 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.
Given median of a five number
[#permalink]
Updated on: 30 Aug 2016, 02:14
Updated on: 30 Aug 2016, 02:14
1
00:00
Question Stats:
91% (00:37) correct
8% (01:16) wrong based on 34 sessions
Hide Show timer Statistics
Given median of a five number set as 24.5. If a value k is added to each number in the set, then the new median becomes 28.5. What is the value of k?
Show: ::
4
Originally posted by Sonalika42 on 28 Aug 2016, 03:17.
Last edited by Sonalika42 on 30 Aug 2016, 02:14, edited 1 time in total.
Last edited by Sonalika42 on 30 Aug 2016, 02:14, edited 1 time in total.
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: Given median of a five number
[#permalink]
29 Aug 2016, 15:39
29 Aug 2016, 15:39
2
Sonalika42 wrote:
Given median of a five number set as 24.5. If a value k is added to each number in the set, then the new median becomes 28.5. What is the value of k?
A quick approach to choose an initial set that satisfies the given condition.
Here's a 5-number set with a median of 24.5: {1, 2, 24.5, 27, 28}
Add k to each number in the set to get: {1+k, 2+k, 24.5+k, 27+k, 28+k}
As we can see, the median of the NEW SET is 24.5+k
Since we're told the new median is 28.5, we can write: 24.5+k = 28.5
Solve for k to get k = 4
Answer:
Show: ::
4
RELATED VIDEO
