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<p><strong><span style="font-family: 'times new roman', times, serif;">Utility Bills</span></strong></p> <p><span style="font-family: 'times new roman', times, serif;">The normal distribution of monthly utility bills in a city has a mean of $100 and a standard deviation of $12.</span></p> <ol> <li><span style="font-family: 'times new roman', times, serif;"><span style="font-family: 'times new roman', times, serif;">What percent (to three significant figures) of the utulity bills are more than $125?<br /></span>{1:NM:=1.86}%<br /><br /></span></li> <li><span style="font-family: 'times new roman', times, serif;">If 300 utility bills are randomly selected, about how many would you expect to be less than $90? (round your answer to the nearest bill)<br />{1:NM:=61} bill(s)</span></li> </ol>
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Tuesday, 5 November 2013, 10:15 AM
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