Herb K. answered • 05/31/19
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3! = 3*2*1 = 6 permutations: AB
AC
BA
BC
CA
CB
with permutations, order is important
Frances B.
asked • 05/26/19Joe is choosing a 2-letter password from the letters A, B, and C. The password cannot have the same letter repeated in it. How many such passwords are possible?
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