37. In a survey of 700 people it was found that 250 persons read newspaper A,200 read newspaper B,100 read newspaper C,50 read both A&B,30 read both A&C & 15 read both B and C.if 3 persons read all three newspapers then find the number of persons who read . (I) atleast 1 newspaper. (II) exactly 1 newspaper. (III) atmost 1 newspaper.

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