How many ways can the letters in Street be arranged?
回答 (3)
2016-08-02 7:32 pm
street has 6 letters: two t's and two e's =>
6!/(2i * 2i) = 180
6!/(2i * 2i) = 180
2016-08-02 7:31 pm
6!/(2! * 2!) =
180
180
2016-08-02 7:33 pm
180.!
收錄日期: 2021-04-21 19:32:42
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