Since we have 26 choices for a frist letter, 25 for a second letter, 24 for the thrid letter and 23 for the fourth letter, the available number of 4 letter words are 26*25*24*23 = 358,800.
Ds I.
asked • 02/12/23Statistics and probability
How many different four-letter passwords can be created for a software access if no letter can be used more than once?
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