document.write( "Question 1193840: With a view to estimating how many fish there are in a big lake, 25,000 fish are tagged and then released.
\n" ); document.write( "After some time 20,000 fish are captured and it is found that 50 of them are tagged.
\n" ); document.write( "Give an estimate of the number of fish in the lake.\r
\n" ); document.write( "\n" ); document.write( "50/20000= 1/400\r
\n" ); document.write( "\n" ); document.write( "25000 * 1/400= 10 000 000\r
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Algebra.Com's Answer #825896 by ikleyn(52780) $\"\"$ $\"About$

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\n" ); document.write( "With a view to estimating how many fish there are in a big lake, 25,000 fish are tagged and then released.
\n" ); document.write( "After some time 20,000 fish are captured and it is found that 50 of them are tagged.
\n" ); document.write( "Give an estimate of the number of fish in the lake.
\n" ); document.write( "50/20000= 1/400
\n" ); document.write( "25000 * 1/400= 10 000 000
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document.write( "To give an estimate, we write this proportion\r\n" );
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document.write( "     = ,\r\n" );
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document.write( "where X is the number of fish in the lake (total) which we want to estimate.\r\n" );
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document.write( "This proportion express a very natural assumption that all tagged and released fish \r\n" );
document.write( "are uniformly distributed among all other fish in the lake.\r\n" );
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document.write( "From the proportion, we get  X =  = 10,000,000.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved and explained.\r
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\n" ); document.write( "\n" ); document.write( "On proportions, see the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Proportions\r
\n" ); document.write( "\n" ); document.write( "    - Using proportions to solve word problems \r
\n" ); document.write( "\n" ); document.write( "    - Using proportions to solve word problems in Physics \r
\n" ); document.write( "\n" ); document.write( "    - Using proportions to solve Chemistry problems\r
\n" ); document.write( "\n" ); document.write( "    - Using proportions to estimate the number of fish in a lake (*)\r
\n" ); document.write( "\n" ); document.write( "    - HOW TO algebreze and solve these problems using proportions \r
\n" ); document.write( "\n" ); document.write( "    - OVERVIEW of lessons on proportions\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "These lessons were written specially for you. \r
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\n" ); document.write( "\n" ); document.write( "Read them and become an expert in this area.\r
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\n" ); document.write( "\n" ); document.write( "Start from the very first lesson.\r
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\n" ); document.write( "\n" ); document.write( "Consider these lessons as your textbook, handbook, tutorials and (free of charge) home teacher.\r
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\n" ); document.write( "\n" ); document.write( "Of these lessons, the most relevant to your problem is the lesson marked (*) in the list.\r
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\n" ); document.write( "\n" ); document.write( "Read it, too - - - do not miss it !\r
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