(30,0)(30,10) - (30,1)(30,11) +..... + (30,20)(30,30) =: Permutations and Combinations (Mathematics) Question | DivineJEE

(30,0)(30,10) - (30,1)(30,11) +..... + (30,20)(30,30) =: Permutations and Combinations (Mathematics) Question | DivineJEE | divineJEE