Imagine there are 100 baskets, numbered 1,2,...,100, and 100 items, similarly numbered. Item i is in basket j if and only if i divides j evenly. For example, basket 24 is the set of items {1,2,3,4,6,8,12,24}. Describe all the association rules that have 100% confidence. Which of the following rules has 100% confidence?

Question

{3,4,5} → 42
{12,18} → 36
{4,6} → 24
{1,3,6} → 12

Answer 1

{12,18} → 36