+343 Calamitous Clod rolls a pair of rigged dice. The probability of rolling k on a die is directly proportional to k. What is the probability that the sum of Calamitous Clod's dice is equal to 7?
+539 This is almost the same:https://artofproblemsolving.com/wiki/index.php/2016_AIME_I_Problems/Problem_2
