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.
36 only use Netflix
63 only use Redbox
12 only use a video store 17 use only a video store and Redbox
47 use only Netflix and Redbox 23 use only a video store and Netflix
14 use all three
21 use none of these