document.write( "Question 691675: 2.A businessman evaluated his chance of obtaining a contract to produce 1,000, 1,500, 2,000, 2,500 or 3,000 pairs of shoes as follows:\r \n" );
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document.write( "Number of pairs 1,000 1,500 2,000 2,500 3,000 \n" );
document.write( "Probability------16k-----8k------4k-------2k------k\r \n" );
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document.write( "(a) Find the value of k, the chance of producing 3,000 pairs of shoes in one contract.\r \n" );
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document.write( "(b) What are the expectation and standard deviation of pairs of shoes to be produced in one contract?\r \n" );
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document.write( "(c) Suppose the businessman will get $200 for each pair of shoes. What are the expectation and standard deviation of revenue gain in one contract?\r \n" );
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document.write( "(d) Suppose the businessman obtains 10 independent contacts this month. What are the expectation and standard deviation of total revenue gain among 10 contracts? \n" );
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