The Answer to the Question
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Here's the Solution to this Question
There are 256 bit strings of length 8.
There are 511 bit strings of length 8 or less.
(c) There are 26 letters in the alphabet.
The number of 6 letter strings
The number of 6 letter strings without any x
The number of 6 letter strings with at least one x
There are 64,775,151 strings of 6 lower case English letters that have the letter x in them somewhere.
Use the Product Rule
48 different types of this shirt are made.