math

(A) 20% (B) 18% (C) 24% (D) 22%% Roberta chooses an integer r from the set {2, 3, 4, 5, 6, 7,8,9}, an integer s from the set {22, 33, 44, 55, 66, 77, 88, 99}, and an integer t from the set {202, 303, 404, 505, 606, 707, 808, 909}. How many possible values are there for the product rst? (A) 85 (B) 81 (C) 90 (D) 84 (E) 80 does there exist a