There are stalls for 10 animals in a ship. The number of ways the shipload can be made if there are cows, calves and horses to be transported, animals of each kind being not less than 10, is

Each stall can be filled in 3 ways as there are three types of animals (animals of each category being not less than 10).Shipload, i.e., filling up of 10 stalls, can be made in 3 × 3 × … up to 10 times = 310 = 59049.