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# What is x? 1. The median of set (x,1-1,3,-x) is 0 2. The

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CEO
Joined: 21 Jan 2007
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What is x? 1. The median of set (x,1-1,3,-x) is 0 2. The [#permalink]  19 Nov 2007, 15:30
What is x?

1. The median of set (x,1-1,3,-x) is 0
2. The median of set (x,1-1,3,-x) is x/2

CEO
Joined: 29 Aug 2007
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Re: median [#permalink]  19 Nov 2007, 17:03
bmwhype2 wrote:
What is x?

1. The median of set (x, 1-1, 3, -x) is 0
2. The median of set (x, 1-1, 3, -x) is x/2

hu ... is there any typo?

What is 1-1? is it 1.1 or (1 - 1) = 0?
Director
Joined: 13 Dec 2006
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Assuming that 1 and -1 are two different numbers

1. Median of (-x,1,-1,3,x) = 0 only value of X which will satisfy this equation is 0. as in that case 0 will be the median.... satisfied

2. Median of (-x,1,-1,3,0) = x/2, in this case X can be either 2 or 0, in both the case it will satisfy the median... insufficient.

Now lets assure 1-1=0 is one number, then in that case

1. Median of (-x,0,3,x) = 0, only value of X, whicn can satisfy this equation is 0.... satisfied

2. Median of (-x,0,3,x) = x/2 In this case X can be both 0 and 1 hence insufficient.

In both the cases answer is A

Amar
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Amardeep Sharma wrote:

2. Median of (-x,1,-1,3,0) = x/2, in this case X can be either 2 or 0, in both the case it will satisfy the median... insufficient.

Amar

In the Q we have the digit = x, notably (x,1-1,3,-x)
Where is the typo then?

Btw, agree with 1) - Sufficient, but I lost with 2)
Director
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Re: median [#permalink]  19 Nov 2007, 22:29
bmwhype2 wrote:
What is x?

1. The median of set (x,1-1,3,-x) is 0
2. The median of set (x,1-1,3,-x) is x/2

Stat 1:
There are 5 elements which means the 3rd element has to be 0. -x and -1 have to be the 1st 2 elements. 1 and 3 have to be last 2 elements which leaves x = 0. Suff.

Stat 2:
Same reasoning as 1 but x can = 0 or 1; insuff.

A
Director
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Whatever wrote:
Amardeep Sharma wrote:

2. Median of (-x,1,-1,3,0) = x/2, in this case X can be either 2 or 0, in both the case it will satisfy the median... insufficient.

Amar

In the Q we have the digit = x, notably (x,1-1,3,-x)
Where is the typo then?

Btw, agree with 1) - Sufficient, but I lost with 2)

Typo is in the question, where the comma is not used between 1 and -1

Amar
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