Question

In how many ways can a password be made using four letters from the 26 letter English alphabet letters can’t be repeated

Answer 1

If you go by normal method, no. of possible passwords that can be created with 26 alphabets are 26X26X26X26 = 456,976

Explanation:

. If you do not want to repeat the alphabets, you can use combinations. i.e. C(26, 4) or 26C4 = 358,800 ways