1. The problem statement, all variables and given/known data There are four ice cream flavors; chocolate,cookies,strawberry and vanilla. How many different combination of flavors of three scoops of ice cream are possible if it is permissible to make all three scoops the same flavor? 2. Relevant equations 3. The attempt at a solution The answer is 20. But i am very confused about the wording of the question. If only all three scoops with same flavor is counted as a different combination, shouldn't it be just 4(three scoops of same four flavors) + 4*3*2 ( all different flavors combination) then it gives me 28 which is wrong.. What's the point of this question and how to approach to it? Could someone help me out here?