document.write( "Question 359201: A sample of 4 different calculators is randomly selected from a group containing 17 that are defective and 36 that have no defects. what is the probability that atleast one of the calculators is defective? \n" ); document.write( "

Algebra.Com's Answer #256370 by Fombitz(32388) $\"\"$ $\"About$

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P(good)= $\"36%2F%2817%2B36%29=36%2F53\"$
\n" ); document.write( "P(bad)= $\"17%2F%2817%2B36%29=17%2F53\"$
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\n" ); document.write( "P(at least one bad)+P(none bad)=1
\n" ); document.write( "P(at least one bad)=1-P(non bad)
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\n" ); document.write( "P(none bad)= $\"%2836%2F53%29%2836%2F53%29%2836%2F53%29%2836%2F53%29=0.21287\"$
\n" ); document.write( "P(at least one bad)= $\"1-0.21287\"$
\n" ); document.write( "P(at least one bad)= $\"highlight%280.78713%29\"$
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