Yefim S. answered • 12/17/20
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Number of codes not ontaining X this number of codes from 3 letters W, Y, Z.
So we have 33 = 27
Mad F.
asked • 12/17/20How many codes do not contain the letter X?
A code is formed by arranging 3 not necessarily distinct letters from the set {W, X, Y, Z}. ZYW and ZZX are examples of possible codes. How many codes do not contain the letter X?
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