Special codes are designated by either a 7-letter or an 8-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different codes that can be designated with this system?  Choices.
A) 2 (26)^8 B) 26(26)^7 C) 27(26)^7 D) 26(26)^8 E) 27(26)^8
26^7+26^8 = 26^7(1+26)=27*26^7   The answer is 27(26)^7.
<result>C</result>
Special codes are designated by either a 7-letter or an 8-letter code that is created by using the 26 letters of the alphabet. Which of the following gives the maximum number of different codes that can be designated with this system?