A real statistical calculation.
We had a cash prize drawing at work today, awarding 12 cash prizes to
employees in our division. There are 254 people in the division, and 68 of
them were from my own staff. Remarkably, after drawing 12 names, none of my
staff received a single cash prize. The names were written on pieces of
paper and put in a box. The papers weren't folded, and the whole process is
suspect. Anyway, before I make a stink to HR I wanted to know the
statistical probability of *none* of my employees being chosen to win a
prize. I'm thinking it's about 1 in 50.
----- Original Message -----
From: "Chris Reeves" <[EMAIL PROTECTED]>
To: "The Hardware List" <[email protected]>
Sent: Thursday, July 20, 2006 1:39 PM
Subject: Re: [H] Odds calculator
Are you looking for real statistical probability calculation or bookie odd
(RNG*LS/Stat) calculation?
Sent via BlackBerry from Cingular Wireless
-----Original Message-----
From: "Veech" <[EMAIL PROTECTED]>
Date: Thu, 20 Jul 2006 13:35:13
To:"The Hardware List" <[email protected]>
Subject: [H] Odds calculator
I need to figure out the odds, or probability, of something happening.
Say there are 254 ping pong balls are mixed in a bag where 68 of them are
red and the other 186 are white. So, 27% of the balls are red. Someone
who
is blindfolded reaches into the bag twelve times and selects one ping pong
ball each time. What are the odds that all 12 ping-pong balls will be
white?
can anyone point me to an odds/probability calculator that will help me
establish the percentages on this? Or is anyone adept at this type of
calculation that can answer this question?
thanks
