document.write( "Question 383966: a package contains 12 resistors, 3 of which are defective. if 4 are selected find the probability of getting
\n" ); document.write( "a. 0 defective
\n" ); document.write( "b. 1 defective
\n" ); document.write( "c. 3 defective
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Algebra.Com's Answer #271895 by Fombitz(32388)\"\" \"About 
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The probability for a defective resistor is,
\n" ); document.write( "\"P%28D%29=3%2F12=0.25\"
\n" ); document.write( "The probability for a non-defective resistor is,
\n" ); document.write( "\"P%28ND%29=0.75\"
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\n" ); document.write( "Find the probabilities for defective resistors from \"0\" to \"4\" out of 4 total.
\n" ); document.write( "\"P%280%29=1%2A%280.75%29%5E%284%29%2A%280.25%29%5E%280%29=0.3164\"
\n" ); document.write( "\"P%281%29=4%2A%280.75%29%5E%283%29%2A%280.25%29%5E%281%29=0.4219\"
\n" ); document.write( "\"P%282%29=6%2A%280.75%29%5E%282%29%2A%280.25%29%5E%282%29=0.2109\"
\n" ); document.write( "\"P%283%29=4%2A%280.75%29%5E%281%29%2A%280.25%29%5E%283%29=0.0469\"
\n" ); document.write( "\"P%284%29=1%2A%280.75%29%5E%280%29%2A%280.25%29%5E%284%29=0.0039\"
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\n" ); document.write( "a)\"P%280%29=0.3164\"
\n" ); document.write( "b)\"P%281%29=0.4219\"
\n" ); document.write( "c)\"P%283%29=0.0469\"
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