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how to solve
In a survey of 100 computer professionals it
was found that 48 read Byte, 39 read PC World and 44 read PC Magazine.
It was also found that 17 read both Byte and PC World, 18 read both PC
World and PC Magazine, 22 read both Byte and PC Magazine and the balance
20 read none of these magazines. Determine the number of professionals
who read exactly one magazine.
2)34
1)33
3)35
4)36
