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O1- In a survey of 60 people,it was found that 25 people read news paper H, 26 read news paper T,26 readnews paper I, 9 read both H and I, 11 read both H and T, 8 read both T and I, 3 read all three news papersfind:a) the number of people who read at least one of the news papers.b) the number of people who read exactly one news paper. |
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