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If A,B,C,D,E,F,G,H,I,J are in an increasing AP as such.
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Updated on: 03 Aug 2016, 23:08
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Difficulty:
55% (hard)
Question Stats:
55% (01:44) correct 45% (01:39) wrong based on 70 sessions
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If A,B,C,D,E,F,G,H,I,J are in an increasing Arithmetic Progression as such. Then Which of the following operations will result in either mean or the median being modified. A) A is removed B) A and J are removed C) B and I are removed D) A,B,C,H,I,J are removed E) A and E are removed
1) A and B 2) A and E 3) A,C,E 4) All of them 5) None of them
Re: If A,B,C,D,E,F,G,H,I,J are in an increasing AP as such.
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03 Aug 2016, 22:48
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stonecold wrote:
If A,B,C,D,E,F,G,H,I,J are in an increasing Arithmetic Progression as such. Then Which of the following operations will result in either mean or the median being modified. A) A is removed B) A and J are removed C) B and I are removed D) A,B,C,H,I,J are removed E) A and E are removed
1) A and B 2) A and E 3) A,C,E 4) All of them 5) None of them
Here answer will be (B).
There are 10 equidistant numbers on the number line.
Mean and median will be the average of middle two numbers.
If you remove two numbers which is equidistant from either extreme (e.g. B and I), the total deviation on either side of the mean stays the same so mean stays the same. Also, the median is still the average of middle two numbers.
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Re: If A,B,C,D,E,F,G,H,I,J are in an increasing AP as such.
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03 Aug 2016, 23:02
VeritasPrepKarishma wrote:
stonecold wrote:
If A,B,C,D,E,F,G,H,I,J are in an increasing Arithmetic Progression as such. Then Which of the following operations will result in either mean or the median being modified. A) A is removed B) A and J are removed C) B and I are removed D) A,B,C,H,I,J are removed E) A and E are removed
1) A and B 2) A and E 3) A,C,E 4) All of them 5) None of them
Here answer will be (B).
There are 10 equidistant numbers on the number line.
Mean and median will be the average of middle two numbers.
If you remove two numbers which is equidistant from either extreme (e.g. B and I), the total deviation on either side of the mean stays the same so mean stays the same. Also, the median is still the average of middle two numbers.
Hi
My question is that => if we remove Two elements B and I then the series wont be in AP So the mean will have changed.
_________________
Re: If A,B,C,D,E,F,G,H,I,J are in an increasing AP as such.
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03 Aug 2016, 23:04
1
stonecold wrote:
VeritasPrepKarishma wrote:
stonecold wrote:
If A,B,C,D,E,F,G,H,I,J are in an increasing Arithmetic Progression as such. Then Which of the following operations will result in either mean or the median being modified. A) A is removed B) A and J are removed C) B and I are removed D) A,B,C,H,I,J are removed E) A and E are removed
1) A and B 2) A and E 3) A,C,E 4) All of them 5) None of them
Here answer will be (B).
There are 10 equidistant numbers on the number line.
Mean and median will be the average of middle two numbers.
If you remove two numbers which is equidistant from either extreme (e.g. B and I), the total deviation on either side of the mean stays the same so mean stays the same. Also, the median is still the average of middle two numbers.
Hi
My question is that => if we remove Two elements B and I then the series wont be in AP So the mean will have changed.
Mean will not change. Assume values and see why. It doesn't matter that you don't have an AP anymore.
_________________
Karishma Veritas Prep GMAT Instructor
Learn more about how Veritas Prep can help you achieve a great GMAT score by checking out their GMAT Prep Options >
GMAT self-study has never been more personalized or more fun. Try ORION Free!
Re: If A,B,C,D,E,F,G,H,I,J are in an increasing AP as such.
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04 Aug 2016, 11:02
1
VeritasPrepKarishma wrote:
stonecold wrote:
If A,B,C,D,E,F,G,H,I,J are in an increasing Arithmetic Progression as such. Then Which of the following operations will result in either mean or the median being modified. A) A is removed B) A and J are removed C) B and I are removed D) A,B,C,H,I,J are removed E) A and E are removed
1) A and B 2) A and E 3) A,C,E 4) All of them 5) None of them
Here answer will be (B).
There are 10 equidistant numbers on the number line.
Mean and median will be the average of middle two numbers.
If you remove two numbers which is equidistant from either extreme (e.g. B and I), the total deviation on either side of the mean stays the same so mean stays the same. Also, the median is still the average of middle two numbers.
Karishma thank you for your explanation my answer was B
Re: If A,B,C,D,E,F,G,H,I,J are in an increasing AP as such.
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16 Oct 2017, 16:31
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55% (01:44) correct 
