This should help.
http://www.mathpages.com/home/kmath430.htm
"Stan Brown" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Problem posed me by a student: ten persons (A through J) and ten
> envelopes containing cards marked with letters A through J. (Each
> let
Stan Brown wrote:
>
> Problem posed me by a student: ten persons (A through J) and ten
> envelopes containing cards marked with letters A through J. (Each
> letter is in one and only one envelope.)
>
> The random variable x is the number of people who get the "right"
> envelope when the envelope
Problem posed me by a student: ten persons (A through J) and ten
envelopes containing cards marked with letters A through J. (Each
letter is in one and only one envelope.)
The random variable x is the number of people who get the "right"
envelope when the envelopes are handed out randomly. Obv
