15 (1st)+12 (2nd) + 10 (3rd) + 6 (A1) + 5 (A) + 4 (B) + 3 (C) + 2 (D) + 1 (E) -2 (F) + 2 (M)
1st, 2nd, 3rd - Number of Students who achieved these positions
(credit will be given to position holders only once)