Suppose x and y have the following joint probability mass function. p ( 1 , 1 ) = . 10 , p ( 1 , 2 ) = . 12 , p ( 1 , 3 ) = . 16 p ( 2 , 1 ) = . 08 , p ( 2 , 2 ) = . 12 , p ( 2 , 3 ) = . 10 p ( 3 , 1 ) = . 06 , p ( 3 , 2 ) = . 06 , p ( 3 , 3 ) = . 20 find e [ x ] and e [ y ] . find v a r ( x ) and v a r ( y ) . find c o v ( x , y ) . find the correlation between x and y .