Question 981769
Look at all possibilities 
(1,1) (1,2) . . . (1,6)
   .    
   .    
   .    
   .    
(6,1) (6,2) . . . (6,6)
So there are 36 possible outcomes.
Of this there are 3 that will sum to 4.
(1,3) 
(2,2)
(3,1)
So,
{{{P=3/36=1/12}}}