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anonymous

  • one year ago

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 ?

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  1. dan815
    • one year ago
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    okay so there are a total of 26 alphabets if i remember correctly

  2. dan815
    • one year ago
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    |dw:1434728107287:dw|

  3. dan815
    • one year ago
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    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

  4. dan815
    • one year ago
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    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

  5. anonymous
    • one year ago
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    676

  6. anonymous
    • one year ago
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    thank you

  7. dan815
    • one year ago
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    welcome

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