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As reported by recent survey, the mean height of females 20 to 29 years old is...

As reported by recent survey, the mean height of females 20 to 29 years old is 64.2 inches. If the height is approximately normally distributed with a standard deviation of 2.8 inches answer the following. What proportion of 20-29 year old females are between 60 and 70.1 inches tall?
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