Question

Find the number of strings of length 10 of lower case letters of the alphabet, with repeated letters allowed, that begin with C or end with V. You may enter your answer as an expression containing powers, no need to calculate the exact value.

Answer 1

So there will be
`26^8`

Explanation:

We have given that string is of length of 10 alphabet which starts with c and end with v

Repetition is allowed

First we have to fix first and last character of the string, that is c and v

Now we have left 26 -2 = 24 letter

So the number of string will be =
`1* 26* 26* 26* 26* 26* 26* 26* 26* 1= 26^(8)strings`

So there will be
`26^(8)strings` of 10 character of alphabet