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In a consumer survey, 85% of those surveyed liked at least [#permalink]
19 May 2004, 14:10
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In a consumer survey, 85% of those surveyed liked at least one of three products: 1,2 and 3. 50% of those asked liked product 1, 30% liked product 2, and 20% liked product 3. If 5% of the people in the survey liked all three of the products, what percentage of the survey participants liked more than one of the three products?
Does anyone have a good formula to use when there are more than two possible combinations of overlap?