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Data Sufficiency

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Manager
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Data Sufficiency [#permalink]

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New post 09 Aug 2008, 18:48
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Can you provide an answer with an explanation ?
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Director
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Re: Data Sufficiency [#permalink]

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New post 09 Aug 2008, 21:29
C

the equation from the stem is M-J = 2(M-K)
3 unknowns

both statements together you can solve for M

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Re: Data Sufficiency [#permalink]

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New post 10 Aug 2008, 05:44
gmatnub wrote:
C

the equation from the stem is M-J = 2(M-K)
3 unknowns

both statements together you can solve for M


IMO B
since m+j=2k and knowing kate's sal is enough
(2) suffi (1) insuffi
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Senior Manager
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Re: Data Sufficiency [#permalink]

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New post 10 Aug 2008, 10:48
dishant007 wrote:
Can you provide an answer with an explanation ?


Let salary be x, y and z

x-y = 2(x -z)

x = 2z-y

Mean = (x + y + z)/3 = z

Therefore B is suff.

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Manager
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Re: Data Sufficiency [#permalink]

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New post 11 Aug 2008, 14:50
nmohindru wrote:
dishant007 wrote:
Can you provide an answer with an explanation ?


Let salary be x, y and z

x-y = 2(x -z)

x = 2z-y

Mean = (x + y + z)/3 = z

Therefore B is suff.



Why is Mean = (x + y + z)/3 = z ?

How did you reach z?

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Re: Data Sufficiency [#permalink]

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New post 11 Aug 2008, 21:24
sarzan wrote:
nmohindru wrote:
dishant007 wrote:
Can you provide an answer with an explanation ?


Let salary be x, y and z

x-y = 2(x -z)

x = 2z-y

Mean = (x + y + z)/3 = z

Therefore B is suff.



Why is Mean = (x + y + z)/3 = z ?

How did you reach z?



x-y = 2(x -z)

x = 2z-y

x+y=2z

(x + y + z)/3 = (2z+ z)/3=z
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Manager
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Re: Data Sufficiency [#permalink]

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New post 12 Aug 2008, 04:11
How did you reach z?[/quote]


x-y = 2(x -z)

x = 2z-y

x+y=2z

(x + y + z)/3 = (2z+ z)/3=z[/quote]


Thanks x2suresh

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Re: Data Sufficiency   [#permalink] 12 Aug 2008, 04:11
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