1.) In the questions below suppose that a "word" is any string of seven letters of the alphabet, with repeated letters allowed. a) How many words begin with R and end with T? b)How many words begin...

Question:

Extracted text: 1.) In the questions below suppose that a "word" is any string of seven letters of the alphabet, with repeated letters allowed. a) How many words begin with R and end with T? b)How many words begin with A or B? c) How many words begin with A or end with B?