URGENT PLEASE HELP How many 4-letter passords can be made using the letters A thought Z if... a) Repetition of letters is allowed? b) Repetition of letters is not allowed?

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asked Jul 11, 2020 631 views

2 votes

URGENT PLEASE HELP

How many 4-letter passords can be made using the letters A thought Z if...
a) Repetition of letters is allowed?

b) Repetition of letters is not allowed?

Mathematics
middle-school

OldCurmudgeon asked

by OldCurmudgeon

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1 Answer

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a) The answer will be 456976 because you multiply 26 and 4.

b) The answer will be 358800 bacause you multiply 26*25*24*23

ItechDroid answered Jul 16, 2020

by ItechDroid

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