document.write( "Question 375390: a certain insecticide kills 50% of all insects in lab experiments a sample of 11 insects is exposed to the insecticide in a particular experiment what is the probability that exactly 6 insects will survive \n" ); document.write( "

Algebra.Com's Answer #266960 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "Note: The probability of x successes in n trials is: \r
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p & q are = 1/2 or .5
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document.write( "nCx =   11C6 = 462    
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document.write( "P(exactly 6 surviving)=  462*(.5)^6(.5)^5 = .2256 
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