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Tanya prepared 4 different letters to be sent to 4 different addresses. For each letter, she prepared an envelope with its correct address. If the 4 letters are to be put into the 4 envelopes at random, what is the probability that only 1 letter will be put into the envelope with its correct address?

  • A.

    $$\frac{1}{24}$$

  • B.

    $$\frac{1}{8}$$

  • C.

    $$\frac{1}{4}$$

  • D.

    $$\frac{1}{3}$$

  • E.

    3/8

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科目:PS数学

来源:PrepE2

正确率:62.87%

难度:700-800

考点:排列组合与概率