The probability density function \({{\rm{P}}_{\rm{X}}}\left( {\rm{x}} \right)\) of \({\rm{X}}\) is shown below:
The mean of the variable \({\rm{X}}\) is _________ (Take a = 1/8)
1
3
2
5/8
3
8/9
4
9/8
The probability density function \({{\rm{P}}_{\rm{X}}}\left( {\rm{x}} \right)\) of \({\rm{X}}\) is shown below:
The mean of the variable \({\rm{X}}\) is _________ (Take a = 1/8)