document.write( "Question 820647: cars with a certain security system are recovered 87% of the time what is the probability that 4 out 7 cars are recovered? \n" ); document.write( "
Algebra.Com's Answer #493645 by stanbon(75887)\"\" \"About 
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cars with a certain security system are recovered 87% of the time what is the probability that 4 out 7 cars are recovered?
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\n" ); document.write( "P(x=4) = 7C4*(0.87)^4*(0.13)^3 = binompdf(7,0.87,4) = 0.0441
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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