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Today, 20:30

How many 2-digit numbers can be formed from the digits 1 through 8 if each digit is only used once?

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Answers (2)
  1. Today, 23:34
    0
    Answer:57

    Step-by-step explanation:

    12

    13

    14

    15

    16

    17

    18

    21

    23

    24

    25

    26

    27

    28

    31

    32

    34

    35

    36

    37

    38

    41

    42

    43

    45

    46

    47

    48

    51

    52

    53

    54

    56

    57

    58

    61

    62

    63

    64

    65

    67

    68

    71

    72

    73

    74

    75

    76

    78

    81

    82

    83

    84

    85

    86

    87

    ...
  2. Today, 23:34
    0
    56.

    Step-by-step explanation:

    That is the number of permutations of 2 from 8

    = 8P2

    = 8! / (8-2) !

    = 8!/6!

    = 8 * 7

    = 56.
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