document.write( "Question 1188595: Suppose that X is a discrete random variable with probability mass function P(x)= cx^2 , x=1, 2 , 3 , 4. Find the value of c \n" ); document.write( "

Algebra.Com's Answer #819716 by ikleyn(52776) $\"\"$ $\"About$

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document.write( "Find  \" c \" from this equation  P(1) + P2) + P(3) + P(4) = 1,  which is\r\n" );
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document.write( "    c*1^2 + c*2^2 + c*3^2 + c*4^2 = 1,\r\n" );
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document.write( "    c*(1 + 4 + 9 + 16) = 1\r\n" );
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document.write( "    30c = 1\r\n" );
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document.write( "    c   = .     ANSWER\r\n" );
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