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set S = { -4 , x , 0, 17, 1 } what is the median of the set

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Director
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set S = { -4 , x , 0, 17, 1 } what is the median of the set [#permalink] New post 21 Jan 2005, 16:31
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C
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set S = { -4 , x , 0, 17, 1 }

what is the median of the set S

I x > 1

II) x< 2
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 [#permalink] New post 21 Jan 2005, 17:00
A it is...

first put all the elements in the set in order...

-4 0 1 x 17

i) says X is greater than 1, so it will be put on the right of 1, if you look at the median, it will be 1.

II) says x is less than 2, which means if X is say -2, it will to left of 1, making 0 the median....therefore insufficient
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 [#permalink] New post 21 Jan 2005, 17:25
Statement 1 says that x is greater than 1. It could be 2 or could be 20.

So we don't know whether S = { -4, 0, 1, x, 17 }

or S = { -4, 0, 1, 17, x }

and hence we cannot find the median. The statement is not sufficient.

Eliminate answer choices A and D.

Statement 2 says that x is less than 2. It could be -1 or -6. Again we cannot determine the median. Statement 2 is also insufficient and we can eliminate choice B.

Looking at both the statments together, we can be sure that

S = { -4, 0, 1, x, 17 }. The median is 1 and both the statements together are sufficient to answer the question.

The answer is C.
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 [#permalink] New post 21 Jan 2005, 17:32
(A) it is.
No matter what x is, as long as it is > 1, it will always come after 1 which means out of 5 numbers, 1 will be the middle number (median)
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 [#permalink] New post 21 Jan 2005, 17:44
You are right! I must go to sleep now...

and hopefully get better at math overnight!! :oops:
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 [#permalink] New post 21 Jan 2005, 22:10
(A) (median is 0 for I, not sufficient for II)
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Re: DS : Median [#permalink] New post 22 Jan 2005, 02:43
rxs0005 wrote:
set S = { -4 , x , 0, 17, 1 }

what is the median of the set S

I x > 1

II) x< 2


A

I if x > 1 then the median is one

II if x < 2 the median could be x, 1, or 0 depending on your value of x

so A
Re: DS : Median   [#permalink] 22 Jan 2005, 02:43
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set S = { -4 , x , 0, 17, 1 } what is the median of the set

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