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One pocket of a backpack contains only pencils, pens, and highlighters. If a writing utensil is selected at random from this pocket, what is the probability that the chosen writing utensil is either a pen or a highlighter?

(1) The probability of choosing a highlighter is .

(2) The probability of choosing a pencil is

  • 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 statements 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: B

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