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If the first term in the data set above is 3, what is the third term?

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If the first term in the data set above is 3, what is the third term?  [#permalink]

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New post 24 Feb 2017, 22:25
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{x, y, z}

If the first term in the data set above is 3, what is the third term?

(1) The range of this data set is 0.
(2) The standard deviation of this data set is 0

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Re: If the first term in the data set above is 3, what is the third term?  [#permalink]

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New post 25 Feb 2017, 00:16
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SajjadAhmad wrote:
{x, y, z}

If the first term in the data set above is 3, what is the third term?

(1) The range of this data set is 0.
(2) The standard deviation of this data set is 0


A set, by definition, is a collection of elements without any order. (While, a sequence, by definition, is an ordered list of terms.) So, it makes no sense talking about first term in the set.
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Re: If the first term in the data set above is 3, what is the third term?  [#permalink]

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New post 25 Feb 2017, 08:35
D
Each statement alone s sufficient here
Statement 1
Highest - lowest = range
Means each term is same
Statement 2
Standard deviation is 0
Means all r same
D

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Re: If the first term in the data set above is 3, what is the third term?  [#permalink]

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New post 25 Feb 2017, 11:01
Bunuel wrote:
SajjadAhmad wrote:
{x, y, z}

If the first term in the data set above is 3, what is the third term?

(1) The range of this data set is 0.
(2) The standard deviation of this data set is 0


A set, by definition, is a collection of elements without any order. (While, a sequence, by definition, is an ordered list of terms.) So, it makes no sense talking about first term in the set.



Bunuel ,, going by ur statement lets try to solve the problem,,,
stat 1 is not suff,,

stat 2 will be suff becoz,, in a set or sequence, standard deviation will be zero only when all the elements are same

correct me if im rong.. skywalker
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Re: If the first term in the data set above is 3, what is the third term?  [#permalink]

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New post 26 Feb 2017, 03:16
mohshu wrote:
Bunuel wrote:
SajjadAhmad wrote:
{x, y, z}

If the first term in the data set above is 3, what is the third term?

(1) The range of this data set is 0.
(2) The standard deviation of this data set is 0


A set, by definition, is a collection of elements without any order. (While, a sequence, by definition, is an ordered list of terms.) So, it makes no sense talking about first term in the set.



Bunuel ,, going by ur statement lets try to solve the problem,,,
stat 1 is not suff,,

stat 2 will be suff becoz,, in a set or sequence, standard deviation will be zero only when all the elements are same

correct me if im rong.. skywalker


It does not make much sense to talk about the correct answer of a flawed question.

Topic locked.
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New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
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Re: If the first term in the data set above is 3, what is the third term? &nbs [#permalink] 26 Feb 2017, 03:16
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