75
8
8
8
8
8
× + ×
+ × + ×
=
=
and
E(Y) =
1
2
3
1
1
22
1
0
4
5
6
2 75
8
8
8
8
8
8
− × + ×
+ × + × =
× =
=
The variables X and Y are different, however their means are same It is also
easily observable from the diagramatic representation of these distributions (Fig 13 5)