What is the probability that a randomly selected family

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According to a research firm, in U.S., the mean amount spent by a family of four on food per month is $500 with a standard deviation of $75. Assuming that the food costs are normally distributed, what is the probability that a randomly selected family of four spends less than $480 per month? (Round your answer to 4 decimal places.)

Reference no: EM131144074

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