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题库 / GMATLA-DS-40
~$(n-x)+(n-y)+(n-c)+(n-k)$~
What is the value of the expression above?
(1) The average (arithmetic mean) of ~$x, y, c$~, and ~$k$~ is ~$n$~.
(2) ~$x, y, c$~, and ~$k$~ are consecutive integers.
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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傻了 x, y, c, k 的平均是n，加起来就等于4n阿，写的时候大概脑子抽风...
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