How many four digit numbers can be formed using the digits 1, 2 only so that each of these digits is used at least once.​

Question

How many four digit numbers can be formed using the
digits 1, 2 only so that each of these digits is used at
least once.​

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Julia 1 month 2021-08-12T15:06:25+00:00 1 Answer 0 views 0

Answers ( )

  1. Emma
    0
    2021-08-12T15:08:05+00:00

    9321

    Step-by-step explanation:

    first we add 1 and 2 we got 3 ,we take square root of 3 we got 9

    it is not perfect answer

    i hope that it is right

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18:9+8+9*3-7:3-1*13 = ? ( )