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3 March, 06:14

Which of the expressions can you use to find the number of 3-digit passwords you can make using the digits 5, 6, and 7, if you do not repeat any of the digits?

3 x 2 x 1

3 + 2 + 1

5 x 6 x 7

5 + 6 + 7

+2
Answers (1)
  1. 3 March, 06:18
    0
    Hello,

    Codes are:

    5_6_7, 5_7_6

    6_5_7,6_7_5

    7_5_6,7_6_5

    Choising the first (3 possibilities)

    next choising the second (2 possibilities)

    chosing the last (1 possibility)

    So 3*2*1=6

    Answer A
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