Econ319_08S_01sol - Econ 319 Spring 2008 TA: Seung Han Yoo...

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Econ 319 Spring 2008 TA: Seung Han Yoo Solution to Problem Set 1 1. (#1.27) 26 25 24 23 22 26 5 2. (#1.30) a. ( 55 25 ) 2 ( 60 30 ) = 0 : 05 . b. ( 55 26 )( 5 4 ) 2 ( 60 30 ) = 0 : 3 . c. ( 55 26 ) 2 ( 60 30 ) = 0 : 06 . 3. (#1.38) a. 6 3 ± = 20 . b. 9 6 6 3 ± = 1680 . 4. (#1.42) 11 4 7 3 4 3 ± = 46 ; 200 . 5. (#1.48) a. Let W 2 denote the event that the second ball drawn is white, W 1 denote the event R 1 P ( W 2 ) = P ( W 2 \ W 1 ) + P ( W 2 \ R 1 ) = P ( W 2 j W 1 ) P ( W 1 ) + P ( W 2 j R 1 ) P ( R 1 ) = 3 6 2 5 + 2 6 3 5 = 2 5 . b. P ( W 1 j W 2 ) = P ( W 2 \ W 1 ) P ( W 2 ) = 1 = 5 2 = 5 = 1 2 . 6. (#1.57) The event that given that a silver coin is found in a cabinet, the other drawer in the 1
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cabinet contains a silver coin is the same as the event that given that a silver coin is found in a cabinet, the cabinet is B .
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This homework help was uploaded on 02/23/2008 for the course ECON 3190 taught by Professor Hong during the Spring '07 term at Cornell University (Engineering School).

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Econ319_08S_01sol - Econ 319 Spring 2008 TA: Seung Han Yoo...

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