Question 12 (4 points) What is a big- estimate of the number of writing 3-letter strings using a fixed alphabet (e.g. the alphabet A =
Question 12 (4 points) What is a big- estimate of the number of writing 3-letter strings using a fixed alphabet (e.g. the alphabet A = [A, B, ..., Y, Z}) but without allowing duplicate letters ? Oo(n 3) O o (n ? ) O o(n!) Oo (2 ") Oo(3")
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