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Joe wants to find all the four-letter words that begin and end with different letters. How many combinations of letters satisfy this property?

 Apr 18, 2022
 #1
avatar+122 
-1

Here go a good demonstration of a probem you have here 

Just cick n this link: https://web2.0calc.com/questions/i-feel-like-i-m-posting-too-many-questions

sincerely 𝓘𝓽𝔃_¥𝓪 𝓑Ø¥_Ð@®𝓴 𝓟®ØÐ𝓘𝓖¥

 Apr 18, 2022
 #2
avatar+122390 
+1

Assuming  that   letters can  be  repeated....we  can  choose   any of the 26 letters for the  first  three places  and  any of the remaining 25  for the last one

 

So

 

26^3 * 25   =  439400

 

cool cool cool

 Apr 18, 2022

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