anonymous
  • anonymous
The following problem refers to strings in A, B, ..., Z. How many three-letter strings are there that begin with H ?The following problem refers to strings in A, B, ..., Z. How many three-letter strings are there that begin with H ?
Mathematics
schrodinger
  • schrodinger
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dan815
  • dan815
okay so there are a total of 26 alphabets if i remember correctly
dan815
  • dan815
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dan815
  • dan815
We have decided the first letter is already H, for the 2nd and 3rd place we can have any of the letters, so 26 in each

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dan815
  • dan815
for each letter you pick for the 2nd place, there are another 26 different ones for the 3rd place, which is why, there have to be a total of 26*26 different 3 letter strings, that start with H
anonymous
  • anonymous
676
anonymous
  • anonymous
thank you
dan815
  • dan815
welcome

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