How many 4-letter words can we make from the letters A, B, C, and D, we are allowed to repeat letters, and we must use the letter B at least once ? (Show 2 different methods clearly

Guest Feb 14, 2022

#1**+1 **

You have to think of a logical method that might work.

Suggestion

Hoe many ways if only one letter is used

How many ways if 2 letters are used

How many ways if 3 letters are used

How many ways if 4 letters are used.

Thinks about that and come back with some of your own input.

Melody Feb 14, 2022