Geoff needs to create a password for his E-mail account. The password must have three letters. How many different passwords can he make?

Assume he may not use each letter more than once.

1 Answer

#17,576" "# passwords

Explanation:

Considering repetition of letters are allowed

so that AAA, BBB, CCC and so forth and so on...
also

AAB, AAC, AAD, and so forth and so on...

are all allowed then

26 * 26 * 26 =17576 passwords

God bless....I hope the explanation is useful