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What is the average (arithmetic mean) of eleven consecutive integers?

(1)The average of the first nine integers is 7.

(2)The average of the last nine integers is 9.
  • AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
  • BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
  • CBOTH statement TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
  • DEACH statement ALONE is sufficient.
  • EStatements (1) and (2) TOGETHER are NOT sufficient.
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正确答案: D
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题目基本信息

  • 所属科目:数学DS
  • 题目来源1:PREP07 Test 1-73
  • 正确率:62%
  • 难度: 中等

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