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# What is the range of numbers in Set S? (1) The standard

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Joined: 26 May 2008
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What is the range of numbers in Set S? (1) The standard [#permalink]

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27 Jun 2008, 05:59
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What is the range of numbers in Set S?
(1) The standard deviation of the numbers is 3.
(2) The average of all numbers is 5.

A. Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
B. Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
C. BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
D. Each Statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
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27 Jun 2008, 06:22
kapilnegi wrote:
What is the range of numbers in Set S?
(1) The standard deviation of the numbers is 3.
(2) The average of all numbers is 5.

A. Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient.
B. Statement (2) ALONE is sufficient but Statement (1) ALONE is not sufficient.
C. BOTH Statements TOGETHER are sufficient, but NEITHER Statement alone is sufficient.
D. Each Statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

Average and standard deviation alone don't define a distribution (unless a very special case when the kind of distribution is specified and it's a "nice" kind) -> don't define a range -> E
Re: DS - Range   [#permalink] 27 Jun 2008, 06:22
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