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题目内容
List T consists of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S. The estimated sum of the 30 decimals, £, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the nearest integer, and each decimal in T whose tenths digit is odd is rounded down to the nearest integer; E is the sum of the resulting integers. If $$\frac{1}{3}$$ of the decimals in T have a tenths digit that is even, which of the following is a possible value of E - S ?

I.-16

II.6

III.10
  • AI only
  • BI and II only
  • CI and III only
  • DII and III only
  • EI,II, and III
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正确答案: B
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题目基本信息

  • 所属科目:数学PS
  • 题目来源1:OG15-218
  • 题目来源2:OG16-222
  • 题目来源3:OG17-224
  • 题目来源4:OG18-225
  • 正确率:38%
  • 难度:

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