Recent content by krytie75
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Undergrad Another how many combinations question - slightly more complicated
Ahhh! I forgot my basic maths and didn't balance the equation. Thanks Mentallic, that's really appreciated.- krytie75
- Post #7
- Forum: Set Theory, Logic, Probability, Statistics
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Undergrad Another how many combinations question - slightly more complicated
= (1-36^8+1)/(1-36) = (1-36^9)/(1-36) = -101559956668415/-35 = 2901713047669 Sorry, I'm new here and don't know how to use the proper maths characters yet.- krytie75
- Post #5
- Forum: Set Theory, Logic, Probability, Statistics
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Undergrad Another how many combinations question - slightly more complicated
Hi Mentallic! Thanks for your help, it all makes perfect sense! One thing I'm not quite sure on though... When I use the formula you provided at the bottom of your response, I get the answer: 2901713047669 However when I manually calculate 36+36^2+...+36^8 I get the answer...- krytie75
- Post #3
- Forum: Set Theory, Logic, Probability, Statistics
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Undergrad Another how many combinations question - slightly more complicated
Hi. I need a little help. I'm trying to work out how many combinations of characters there are for a string that is between 1 and 8 characters long and uses a-z (non caps) and 0-9. There are 36 useable characters and the string could be anything from simply 'a' to '99999999'. I was able to...- krytie75
- Thread
- Combinations
- Replies: 7
- Forum: Set Theory, Logic, Probability, Statistics