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Any1Else2005
 one year ago
The following problem refers to strings in A, B, ..., Z.
How many fourletter strings are there that begin with A ?
Any1Else2005
 one year ago
The following problem refers to strings in A, B, ..., Z. How many fourletter strings are there that begin with A ?

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BangkokGarrett
 one year ago
Best ResponseYou've already chosen the best response.0We have to make 3 choices, right? : the 2nd letter, the 3rd letter and the 4th letter. Each choice is independent, so we multiply them. Number of choices for 2nd letter x Number of choices for 3rd letter x Number of choices for 4th letter How many choices do we have for each letter?

Any1Else2005
 one year ago
Best ResponseYou've already chosen the best response.1Hello BangkokGarrett, basically its a total of the 3 choices, they are basically asking the total number of choices

BangkokGarrett
 one year ago
Best ResponseYou've already chosen the best response.0I understand the question....I'm just trying to get you to fill in the blank. We have 26 choices for each letter. So the number of 4 letter strings that begin with A will be: 26 x 26 x 26

Any1Else2005
 one year ago
Best ResponseYou've already chosen the best response.1I'm sorry, for the 3 string its 26^3, so for the 4th string its 26^4? Would that be a safe assumption?

Any1Else2005
 one year ago
Best ResponseYou've already chosen the best response.1Its 17576, thk you so much sir
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