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Math Help - Probability.. this one should be fast if you know how

  1. #1
    Junior Member
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    Probability.. this one should be fast if you know how

    Tell me if my first answer is right and the rest of mine will be. .)

    answer to a.) There would have been 10 possibilities for each number and 26 possibilities for each letter to begin with. The six character listen plate would have : 10*10*10*26*26*26 combinations or 17,576,000. There are now 36 possibilities for each character which means 36^6 or 2,176,782,336. The second one subtracted by the first one makes for 2,159,206,336 more possibilities.

    This dosent seem to go along with the lesson in the book(permutations) thats why im wondering
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  2. #2
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    Quote Originally Posted by Arbitur
    This dosent seem to go along with the lesson in the book(permutations) thats why im wondering
    Yes, it is rather strange. You solved it right. If there were a condition that the characters can't repeat ...
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