A luxury box of chocolates contains 9 chocolates. Four are covered in milk chocolate, 3 are covered in dark chocolate and two are covered in white chocolate. Three chocolates are selected at random from the box.
We define the random variables:
X = number of dark covered chocolates selected
Y = number of white covered chocolates selected

Draw up a table showing f(x,y) the joint pmf of X and Y

Question

A luxury box of chocolates contains 9 chocolates. Four are covered in milk chocolate, 3 are covered in dark chocolate and two are covered in white chocolate. Three chocolates are selected at random from the box.
We define the random variables:
X = number of dark covered chocolates selected
Y = number of white covered chocolates selected

Draw up a table showing f(x,y) the joint pmf of X and Y