document.write( "Question 732336: Lifetime of batteries are independent and have an exponential distribution with failure rate lambda = .05 per day.\r
\n" ); document.write( "\n" ); document.write( "Suppose we buy a pack of 8 batteries, what is the probability that 2 will last less than 25 days, 4 will last between 25 and 70 days, 2 will last more than 70 days?
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Algebra.Com's Answer #447780 by lynnlo(4176)\"\" \"About 
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