During her birthday, her parents have decided to give Laura and her 2 younger brothers new cellphones. However, they are confused between the innumerable service providers. Assuming no child wants a provider that another sibling has, and that there are 20 service providers, in how many ways can the parents grant the children their phones?
+37158 20 choices for child 1 leaves
19 choices for child 2 leaves
18 choices for child 3
20 x 19 x 18 = 6840 possible combos
+37158 20 choices for child 1 leaves
19 choices for child 2 leaves
18 choices for child 3
20 x 19 x 18 = 6840 possible combos
