Hi, Just had a question which I think is something simple. Product from i=1 to n of (e^(-mu))(mu^(x_i))/x! = constant x (e^(-n(mu)))mu^(summation x_i) Could someone give me the breakdown as i'm not sure where the constant as come from. There are loads of questions in chapter 10 where the product of something leads to a constant x something else; I think i'm missing something. Any help will be great. Thanks in Advance. Salil
