A manager for an insurance company believes that customers have the following preferences for life insurance products: 40% prefer Whole Life, 30% prefer Universal Life, and 30% prefer Life Annuities. The results of a survey of 320 customers were tabulated. Is it possible to refute the sales manager's claimed proportions of customers who prefer each product using the data

answer: just subtact the units and then add the non negative : happy to

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it would take 7/10 of an hour too fill the pool.

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