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What is the mean value of n-x, n-y, n-z, n-w? (1) The mean

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What is the mean value of n-x, n-y, n-z, n-w? (1) The mean [#permalink] New post 31 Jan 2004, 06:44
What is the mean value of n-x, n-y, n-z, n-w?
(1) The mean value of x, y, z, and w is n.
(2) n=280

Please help me to understand this question
Thank you,
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 [#permalink] New post 31 Jan 2004, 07:03
is it A) Statement 1 alone is sufficient.
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 [#permalink] New post 31 Jan 2004, 07:58
can you explain why?
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 [#permalink] New post 31 Jan 2004, 09:44
n-x + n-y + n-z + n-w
4

4n - (w+x+y+z)
4

since
w+x+y+z = n
4

n - n =0, Hence the answer is A

Please validate?
  [#permalink] 31 Jan 2004, 09:44
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What is the mean value of n-x, n-y, n-z, n-w? (1) The mean

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