document.write( "Question 568529: If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?\r
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Algebra.Com's Answer #367005 by jim_thompson5910(35256) $\"\"$ $\"About$

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Since the distribution is symmetric about the mean of 2500, this means that 50% of the bulbs will have a life less than 2500 hours. \n" ); document.write( "

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