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Family incomes have a mean of $60 000 with a standard deviation of $20 000. The data are normally distributed. A new tax law is

Family incomes have a mean of $60 000 with a standard deviation of $20 000. The data are normally distributed. A new tax law is designed to support families with family incomes from $45 000 to $80 000. What percentage of families will this new tax law help?

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