document.write( "Question 731941: The integer X has probability density\r \n" );
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document.write( "fX(n) = 1/22 (1) (1<=n<=22)\r \n" );
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document.write( "and the integer Y TM has probability density\r \n" );
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document.write( "fY(n) = 1/17 (1) (1<=n<=17) \n" );
document.write( "Symbolism: (1)... is 1 if the condition is in the parentheses its true and 0 otherwise.\r \n" );
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document.write( "TM Z is defined as follows: flipping a fair coin. If it comes up heads then we set Z = X else Z = Y. we\r \n" );
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document.write( "What is the expected value E{Z};\r \n" );
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document.write( "i need some help here to solve this \n" );
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