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In a survey of 100 persons it was sound ...

In a survey of 100 persons it was sound that 28 read magazine A, 30 readmagazine B, 42 read magazine C, 8 read magazines A & B, 10 read magazine B&C and 3 read all the three. Find:

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In a survey of 100 persons it was sound that 28 read magazine A, 30 readmagazine B, 42 read magazine C, 8 read magazines A & B, 10 read magazine A & C and 5 read magazine B&C and 3 read all the three. Find how many read none of three magazines?

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