Of the 30 applicants for a job, 14 had at least 4 years experience, 18 had degrees and 3 had less than 4 years experience and did not have a degree. How many of the applicants had at least 4 years experience and a degree?
Solution
Correct Answer: Option A
set A : people with more than 4 years exp set B : people with degree
AUB = total - (less than 4 exp and no degree) AUB = 30-3=27
AUB = A + B - A ∩ B A ∩ B = 18+14-27 =5
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