Asked by jerry
If a bar code contains a letter followed by a digit from 1 to 9 followed by another letter how many different codes are possible?
Answers
Answered by
Reiny
So "another letter" means, the same letter cannot be repeated
26 choices for 1st letter
9 choices for the number
25 remaining choices for the last letter.
what is 26 x 9 x 25 ?
26 choices for 1st letter
9 choices for the number
25 remaining choices for the last letter.
what is 26 x 9 x 25 ?
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