document.write( "Question 1181523: A shipment of assembly parts from a vendor offering inexpensive parts is used in a manufacturing plant. The box of 12 parts contains 5 that are defective and will not fit during assembly. A worker picks parts one at a time and attempts to install them. Find the probability of each outcome.\r
\n" ); document.write( "\n" ); document.write( "(a) The first two chosen are both good.\r
\n" ); document.write( "\n" ); document.write( "(b) At least one of the first three is good.\r
\n" ); document.write( "\n" ); document.write( "(c) The first four picked are all good.\r
\n" ); document.write( "\n" ); document.write( "(d) The worker has to pick five parts to find one that is good. \n" ); document.write( "

Algebra.Com's Answer #811430 by ikleyn(52788) $\"\"$ $\"About$

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\n" ); document.write( "A shipment of assembly parts from a vendor offering inexpensive parts is used in a manufacturing plant.
\n" ); document.write( "The box of 12 parts contains 5 that are defective and will not fit during assembly.
\n" ); document.write( "A worker picks parts one at a time and attempts to install them. Find the probability of each outcome.
\n" ); document.write( "(a) The first two chosen are both good.
\n" ); document.write( "(b) At least one of the first three is good.
\n" ); document.write( "(c) The first four picked are all good.
\n" ); document.write( "(d) The worker has to pick five parts to find one that is good.
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\n" ); document.write( "\n" ); document.write( "At the beginning, there are 7 good and 5 defective parts in the set of 12 parts.\r
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document.write( "(a)  P =  = reduce fractions =  = .    ANSWER\r\n" );
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document.write( "         Quite simple:    is the probability to get first good part from the set of 12 parts;\r\n" );
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document.write( "                          is the probability to get the second good part from remaining 6 good \r\n" );
document.write( "                              parts among remaining 11 parts.\r\n" );
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document.write( "(b)  P =  =  =  =  is the total number of different selection 3 parts of 12 parts.\r\n" );
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document.write( "         The numerator is the number of favorable sets of 3 parts, containing at least 1 good part of the 3.\r\n" );
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document.write( "(c)  P =  = reduce fractions =  =  = .    ANSWER\r\n" );
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document.write( "         The same logic works as in part (a).\r\n" );
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\n" ); document.write( "\n" ); document.write( "Let me stop at this point: I do not like to answer tooooooooo many questions at a a time.\r
\n" ); document.write( "\n" ); document.write( "It is not a good style of teaching.\r
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