Asked by Adedeji Ogunba

Using the ordinary alphabet and allowing repeated letters, find the number of words of length 8 that have
exactly one B.

How do I solve this? Please leave an explanation to solve this.
Answered by Steve
there are 25 letters besides the B. So, each of the other 7 positions has 25 choices, making a total of 8*25^7 ways to form words with one B somewhere.
Answered by Adedeji Ogunba
So what does length 8 mean? So is length like a position?
Answered by Steve
no - a word of 8 letters
it is 8 letters long
its length is 8
The B can be in any of 8 places; that's why the 8*25^7