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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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Intern
Joined: 21 Oct 2003
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Location: Israel
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What is the mean value of n-x, n-y, n-z, n-w? (1) The mean [#permalink]  31 Jan 2004, 05:44
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

Thank you,
N
Manager
Joined: 26 Dec 2003
Posts: 227
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is it A) Statement 1 alone is sufficient.
Intern
Joined: 21 Oct 2003
Posts: 2
Location: Israel
Followers: 0

Kudos [?]: 0 [0], given: 0

can you explain why?
SVP
Joined: 16 Oct 2003
Posts: 1815
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Kudos [?]: 50 [0], given: 0

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

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