There are three people in lee’s family. the range if their shoe sizes are 3. two people in her family wear size 6. lee’s size is not 6 or 3. what is lee’s shoe size?

Lee’s shoe size is 9

Step-by-step explanation:

The range is the difference between the lowest and the higher number on a series.  

Here, the range is three.

Two members have size 6. You need to find a number that, different from 6 and 3, which range its three.

Possibilities are:

6-3= 3

9-6=3

You know it's not 3, so it needs to be 9

9-6=3