odds of a 3 and a 2 are 1/6 x 1/6 or 1/36

odds of a 5 and a 1 are 1/6 x 1/6 or 1/36 for a combined probability of 3,2,5,1: 1/36 x 1/36= 1/1296

odds of a 5 with just one die are 1/6 for combined probabilility of 3,2,5,1,5: 1/1296 x 1/6 = 1/ 7776 or approximately 1 hundredth of 1 percent chance