Re: [HOE] probabilities

[Shad Bolling <galahad_21@excite.com>]

You are asking two different things from your dice.  If you want to
determine the probability of rolling a _10_ on the d10 then it is 10%.  If
you want to determine the same for a d8 (with the first roll necessarily
being an 8) it's (.125)*(.125).  If you want to determine the prob. of
rolling a 10 _or better_, THEN you add the prob. of rolling all the other #s
on the 2nd die together, i.e. 3-8, which would be (.125)*(.875), which is
better than 10%.

Shad



On Thu, 12 Apr 2001 15:31:25 -0400 (EDT), hoe@gamerz.net wrote:

  
  Okay, I KNOW I'm going something wrong because I got that the probability
  of rolling a 10 on 1d8 (open ended, of course) is slightly higher (@10.9%)
  then the probability of rolling a 10 on 1d10 (@10%).
  What am I doing wrong?:
  
  probability of rolling an 8 on 1d8 = .125
  probability of rolling a 2+ on 1d8 = .875
  
  .125 * .875 = .109
  
  ???
  
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