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Will the first 10 volumes of a 20-volume encyclopaedia fit upright in the book rack shown above?

(1)x = 50 centimeters

(2)Twelve of the volumes have an average (arithmetic mean) thickness of 5 centimetres
  • 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: E

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