document.write( "Question 694369: Find each probability\r
\n" ); document.write( "\n" ); document.write( "a. P(5;4)\r
\n" ); document.write( "\n" ); document.write( "b. P(2;4)\r
\n" ); document.write( "\n" ); document.write( "c. P(6;3)\r
\n" ); document.write( "\n" ); document.write( "d. P(10;7)\r
\n" ); document.write( "\n" ); document.write( "e. P(9;8)\r
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\n" ); document.write( "\n" ); document.write( "Part 2\r
\n" ); document.write( "\n" ); document.write( "A copy machine randomly puts out 10 blank sheets per 500 copies processed. Find the probability that in a run of 300 copies, 5 sheets of paper will be blank.\r
\n" ); document.write( "\n" ); document.write( "Part 3\r
\n" ); document.write( "\n" ); document.write( "A recent study of robberies for a certain geographic region showed an average of 1 robbery per 20,000 people. In a city of 80,000 people, find the probability of the following:\r
\n" ); document.write( "\n" ); document.write( "a. 0 robberies\r
\n" ); document.write( "\n" ); document.write( "b. 1 robbery\r
\n" ); document.write( "\n" ); document.write( "c. 2 robberies\r
\n" ); document.write( "\n" ); document.write( "d. 3 or more robberies\r
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\n" ); document.write( "\n" ); document.write( "part 4.\r
\n" ); document.write( "\n" ); document.write( "In a 400 page manuscript, there are 200 randomly distributed misprints. If a page is selected, find the probability that it has 1 misprint.
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Algebra.Com's Answer #427900 by MathLover1(20850)\"\" \"About 
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1.\r
\n" ); document.write( "\n" ); document.write( "Probability of event \"A\" that occurs:\r
\n" ); document.write( "\n" ); document.write( " \"P%28A%29+=+n%28A%29+%2F+n%28S%29\"\r
\n" ); document.write( "\n" ); document.write( " \"P%28A%29+=+4+%2F+5\"\r
\n" ); document.write( "\n" ); document.write( " \"P%28A%29+=+highlight%280.8%29\"\r
\n" ); document.write( "\n" ); document.write( "Probability of event \"A\" that does not occur:\r
\n" ); document.write( "\n" ); document.write( " \"P\"(\"A\"') = \"1+-+P%28A%29\" \r
\n" ); document.write( "\n" ); document.write( "\"P\"(\"A\"') = \"1+-++0.8\"\r
\n" ); document.write( "\n" ); document.write( "\"P\"(\"A\"')= \"0.2\"\r
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\n" ); document.write( "\n" ); document.write( "2.\r
\n" ); document.write( "\n" ); document.write( "A copy machine randomly puts out 10 blank sheets per 500 copies processed.
\n" ); document.write( " \"p=10%2F500=highlight%280.02%29\"\r
\n" ); document.write( "\n" ); document.write( "the probability that in a run of \"300+\"copies, \"5+\"sheets of paper will be blank is\r
\n" ); document.write( "\n" ); document.write( "\"p=5%2F300=0.016666666666666666666666666666667\"\"highlight%28p=0.017%29\"\r
\n" ); document.write( "\n" ); document.write( "3.\r
\n" ); document.write( "\n" ); document.write( "\"Prob%28+a+robbery%29+=+20000%2F80000=1%2F4+=+0.25\"\r
\n" ); document.write( "\n" ); document.write( "\"n=80000\"\r
\n" ); document.write( "\n" ); document.write( "The Binomial distribution has the probability\r
\n" ); document.write( "\n" ); document.write( "function \"P%28x=r%29=+nCr+p%5Er+%281-p%29%5E%28n-r%29\"\r
\n" ); document.write( "\n" ); document.write( "\"r\"=\"0\",\"1\",\"2\",.....,\"n\"\r
\n" ); document.write( "\n" ); document.write( "where \"nCr+=+n%21+%2F+%28r%21+%28n-r%29%21%29\"\r
\n" ); document.write( "\n" ); document.write( "For \"80000\" people, we expect \"4\" robberies.\r
\n" ); document.write( "\n" ); document.write( "a)
\n" ); document.write( "\"n=80000\"\r
\n" ); document.write( "\n" ); document.write( "\"p=4%2F80000\"\r
\n" ); document.write( "\n" ); document.write( "\"p=1%2F20000\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28r=0.00005%29\"\r
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\n" ); document.write( "\n" ); document.write( "use the source to compute\r
\n" ); document.write( "\n" ); document.write( "\"%2880000C0%29%281%2F20000%29%5E0%2819999%2F20000%29%5E8000=+0.018\"\r
\n" ); document.write( "\n" ); document.write( "Using Poisson with \"lambda+=4\"\r
\n" ); document.write( "\n" ); document.write( "\"P%28x=0%29=+e%5E-4+%2A%284%5E0+%2F+1%21%29=0.018%281%2F1%29=highlight%280.018%29\"\r
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\n" ); document.write( "\n" ); document.write( "b)\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28r=1%29\"\r
\n" ); document.write( "\n" ); document.write( "Using Poisson with lambda=4\r
\n" ); document.write( "\n" ); document.write( "\"e%5E-4%284%5E1+%2F+1%21%29=0.018%2A4=highlight%280.072%29\"\r
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\n" ); document.write( "\n" ); document.write( "c)\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28r=3%29\"\r
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\n" ); document.write( "\n" ); document.write( "d) \r
\n" ); document.write( "\n" ); document.write( "p( highlight(x >=3))= p( 3 through 20000)\r
\n" ); document.write( "\n" ); document.write( "\"np=80000%280.00005%29=4\"\r
\n" ); document.write( "\n" ); document.write( "\"variance=np%281-p%29=3.99998\"\r
\n" ); document.write( "\n" ); document.write( "\"sd=1.99999\"\r
\n" ); document.write( "\n" ); document.write( "\"P%28+x+%3E=3%29+=+P%28+z+%3E%283-4%29%2F2%29+=+p%28+z+%3E+-0.5%29=highlight%280.6915%29\"\r
\n" ); document.write( "\n" ); document.write( "This uses normal approximation instead of Binomial because \"n\" is too large and \"p\" is too small.\r
\n" ); document.write( "\n" ); document.write( "4.\r
\n" ); document.write( "\n" ); document.write( "Presuming there are \"200\" of \"400\" total pages with misprints, there is a \"50\"% probability of discovering one on any given page.\r
\n" ); document.write( "\n" ); document.write( "\"p=200%2F400=1%2F2=0.50\" which is \"highlight%2850%29\"%\r
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