IKMC 2027 - Grades 7-8 - Self-study SET 10 - Thematic Batch 3 Question 28

Gina has enough money to buy three candies of three different flavours. In how many ways can she buy those three candies?

Original printed choices: A) 3; B) 6; C) 9; D) 10; E) 15

Editorial task: Explain the literal model, the source method and any necessary correction.