Hi,

How many 5  letters codes can be made if no letters can be used twice?

If there are 5 letters used only, then 5! or  5*4*3*2 = 120



If all 26 letters of the alphabet may be used for the code, then:

  26*25*24*23*22  

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
 If you mean letters of the alphabet, and not case sensitive, it's

26*25*24*23*22

= 7893600

 

RELATED QUESTIONS

How many three letter codes can be made from the English alphabet? Only capital letters... (answered by josmiceli)

How many different codes can be made using letters of the word BEAUTY if each code  must... (answered by ewatrrr)

You have 2 letters and 9 digits, How many codes can be made if repetition is... (answered by stanbon)

How many 3-letter "codes" can be made from 7 letters "LMNOPQR" if repetition is not... (answered by Boreal,ikleyn)

If the letters A, B, C, D, and E are to be used in a 5 letter code, how many different... (answered by stanbon)

How many possible security codes can be made using 4 digits followed by 3 letters if (a)... (answered by nerdybill)

How many 5 letter codes can be made with the letters in the word "market" if the letters... (answered by jim_thompson5910)

The call letters of the radio station must have four letters and the first two must be K... (answered by richwmiller)

How many arrangements can be made using three letters from the word DOLPHIN if no letters  (answered by Alan3354)