Answer: The required number of fruit parfaits that Alison can make is 4.
Step-by-step explanation: Given that Alison has
Cup of yogurt for making fruit parfaits and each parfrait requires
cup of yogurt.
We are to find the number of parfaits that Alison can make.
We will be using the UNITARY method to solve the given problem.
We have
Number of fruit parfaits that can be made with
cup of yogurt = 1.
So, number of fruit parfaits that can be made with 1 cup of yogurt will be

Therefore, the number of fruit parfaits that can be made with
cup of yogurt is given by

Thus, the required number of fruit parfaits that Alison can make is 4.