There are 3 people in Johns family.The range of their shoe sizes is 4.
Two people in the family wear shoe size 6.
Johns shoe size is not 6 and it is not 10.
What is Johns shoe size?
Johns shoe size is 2. if there are three people out of the family and two people in the family have size 6 feet. Then the range of the shoe sizes is 4. Essentially 6-2=4.
