Vectors, Venn diagram
In survey taken at the Flim Festival. 200 attendees were asked for which categories of flim they had purchsed tickets. The categories surveyed were commentaries(C), documentaries(D) and movies(M). 35 had tickets for commentaries and movies only. 20 had tickets for commentaries and documentaries. 40 hadticets for documentaries and movies. 74 had tickets for documentaries.18 did not have tickets for any of the three categories surveyed.
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