A survey was given asking whether they watch movies at home from Netflix, Redbox, or a video store. Use the results to determine how many people use Redbox.

38 only use Netflix	72 only use Redbox
17 only use a video store	17 use only a video store and Redbox
57 use only Netflix and Redbox	35 use only a video store and Netflix
9 use all three	16 use none of these

people used Redbox.