Mathematics
reneecrump
19

How many three digit numbers can be made from the digits 1,\ldots,9 if repetitions of digits are not allowed?

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(1) Answers
ashleyam2128

9 values for each digit, order matters: 123 is different than 321, and no repetion 9*8*7 = 504 Look at a simpler example, with 1, 2, 3: 123 132 213 231 312 321 6 numbers 3*2*1 = 6

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