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12 November, 19:58

How many ways can teacher arrange 4 students in front row of class with 30 students

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Answers (2)
  1. 12 November, 20:08
    0
    Choose 4 students from 30

    means 30P4

    657720
  2. 12 November, 20:11
    0
    30 choices for first seat

    29 for 2nd

    28 for 3rd

    27 for 4th

    answer is 30*29*28*27=657720 ways
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