Sets!
Among 100 applicants for a scientific job, it was discovered that ten had no qualification in either physics or chemistry.
83 had a physics qualification. 75 had a chemistry qualification.
How many applicants had qualifications in both physics and chemistry? How many in physics but not chemistry? How many in chemistry but not physics?
posted by steven | 5:33 AM
2 Comments:
7 had only chemistry
15 had only physics
68 had both
10 people have no qualification, wich leaves 90 applicants
90 - 75 ppl who have chemistry = 15 people who ONLY have physics qualification
83 - 15 = 68 people who have both
75 - 68 = 7 with only chemistry
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