Question 746655
probability = {{{(matrix(2,1,12,2))(matrix(2,1,16,3))/((matrix(2,1,28,5))) + (matrix(2,1,12,3))(matrix(2,1,16,2))/((matrix(2,1,28,5))) + (matrix(2,1,12,4))(matrix(2,1,16,1))/((matrix(2,1,28,5))) + (matrix(2,1,12,5))(matrix(2,1,16,0))/((matrix(2,1,28,5)))}}}
OR
probability = {{{sum((matrix(2,1,12,x))(matrix(2,1,16,5-x))/((matrix(2,1,28,5))),  x = 2,  5)}}}