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Probability -- I Might Have Once Known How to Calculate This

Posted By: Marty Storer
Date: Monday, 25 August 2008, at 8:20 p.m.

In Response To: Probability -- I Might Have Once Known How to Calculate This (happyjuggler0)

Off the top of my head, the closest X seems to be 19. You replace only two factors in Bob's calculation: 35/1296 becomes 68/1296, and (20 choose 8) becomes (X choose 8). For the answer to approximate .000000032, (X choose 8) has to approximate 1/1.943 times (20 choose 8). (19 choose 8) seems to be 9/15 times (20 choose 8), but you're not going to get any closer than that because number of rolls is discrete. (18 choose 8) ought to be way less, and (21 choose 8) is of course way more.

How'd I do, calculator users?

Messages In This Thread

• Probability -- I Might Have Once Known How to Calculate This
  Bill Riles -- Sunday, 24 August 2008, at 6:47 p.m.
  • Probability -- I Might Have Once Known How to Calculate This
    Tom Keith -- Sunday, 24 August 2008, at 7:36 p.m.
  • Probability -- I Might Have Once Known How to Calculate This
    bob koca -- Sunday, 24 August 2008, at 7:44 p.m.
    • Probability -- I Might Have Once Known How to Calculate This
      Bill Riles -- Sunday, 24 August 2008, at 7:52 p.m.
    • Probability -- I Might Have Once Known How to Calculate This
      happyjuggler0 -- Sunday, 24 August 2008, at 8:47 p.m.
      • Probability -- I Might Have Once Known How to Calculate This
        Marty Storer -- Monday, 25 August 2008, at 8:20 p.m.
        • Probability -- I Might Have Once Known How to Calculate This
          Bob Koca -- Monday, 25 August 2008, at 8:37 p.m.
          • Probability -- I Might Have Once Known How to Calculate This
            Marty Storer -- Monday, 25 August 2008, at 8:45 p.m.
          • Probability -- I Might Have Once Known How to Calculate This
            Bob Koca -- Monday, 25 August 2008, at 9:10 p.m.
        • Probability -- I Might Have Once Known How to Calculate This
          Tom Keith -- Monday, 25 August 2008, at 8:45 p.m.
          • Probability -- I Might Have Once Known How to Calculate This
            Marty Storer -- Monday, 25 August 2008, at 8:48 p.m.
          • Probability -- I Might Have Once Known How to Calculate This
            Bob Koca -- Monday, 25 August 2008, at 9:11 p.m.
          • Probability -- I Might Have Once Known How to Calculate This
            happyjuggler0 -- Tuesday, 26 August 2008, at 5:34 a.m.
    • Probability -- I Might Have Once Known How to Calculate This
      Barry Silliman -- Sunday, 24 August 2008, at 11:28 p.m.
      • Probability -- I Might Have Once Known How to Calculate This
        Bill Riles -- Sunday, 24 August 2008, at 11:47 p.m.
        • Probability -- I Might Have Once Known How to Calculate This
          Marty Storer -- Monday, 25 August 2008, at 8:06 p.m.
          • Probability -- I Might Have Once Known How to Calculate This
            Bob Koca -- Monday, 25 August 2008, at 8:10 p.m.
            • Probability -- I Might Have Once Known How to Calculate This
              Marty Storer -- Monday, 25 August 2008, at 8:22 p.m.
      • Probability -- I Might Have Once Known How to Calculate This
        Chuck Bower -- Monday, 25 August 2008, at 4:03 p.m.
        • Probability -- I Might Have Once Known How to Calculate This
          Marty Storer -- Monday, 25 August 2008, at 8:00 p.m.
    • Probability -- I Might Have Once Known How to Calculate This
      garyo -- Monday, 25 August 2008, at 6:10 a.m.
  • Probability -- I Might Have Once Known How to Calculate This
    neilkaz -- Sunday, 24 August 2008, at 9:19 p.m.
    • Probability -- I Might Have Once Known How to Calculate This -- LMAO
      Bill Riles -- Sunday, 24 August 2008, at 10:00 p.m.
    • Probability -- I Might Have Once Known How to Calculate This
      Marty Storer -- Monday, 25 August 2008, at 7:54 p.m.
      • Probability -- I Might Have Once Known How to Calculate This
        Barry Silliman -- Monday, 25 August 2008, at 9:14 p.m.
  • Probability -- I Might Have Once Known How to Calculate This
    pfeifrot -- Sunday, 24 August 2008, at 9:29 p.m.