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题库 / GMATAdvanced-DS-25
X,81,73,71,98,73,64
What is the value of X in the above list of 7 numbers?
(1)The average (arithmetic mean) of these 7 numbers is 80.
(2)The range of these 7 numbers is 36.
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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正确A 错误D
2的问题出在：36可以加在最小数上，也可以减在最大数上
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