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Question:
2016 Fall Final - 5
Author: Michiel Smid
In a group of 100 students,
25 drink cider,
50 drink beer,
33 do not drink cider and do not drink beer.
How many people in this group drink both cider and beer?
(a)
8
(b)
10
(c)
9
(d)
11
COMP 2804: Discrete Structures II
COMP 2804 Final Exam
The Principle of Inclusion and Exclusion (3.5)