(Solved): inclusion-exclusion EXAMPLE: At a construction site, Jorge is in charge of hiring skilled work ...

inclusion-exclusion • EXAMPLE: At a construction site, Jorge is in charge of hiring skilled workers for the project. Out of 80 candidates that he interviewed, he found that . 45 of them were painters; 50 of them were electricians ; 50 of them were plumbers; 15 of them had skills in all three areas; all of them had skills in at least one of these areas. • If he hired everyone who were skilled in exactly 2 areas, how many candidates were hired? 33