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ntin a survey conducted, it was found that 50% smoke cigarette A,45% smoke B,40% smoke C,25% smoke A and B,10% smoke B and C,16% smoke C and A.8% smoke all the three brands.What % a)do not smoke? b)smoke only A and c)smoke exactly two brands of cigarettes.n |
| Answer» ntin a survey conducted, it was found that 50% smoke cigarette A,45% smoke B,40% smoke C,25% smoke A and B,10% smoke B and C,16% smoke C and A.8% smoke all the three brands.What % a)do not smoke? b)smoke only A and c)smoke exactly two brands of cigarettes.n | |