document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1205408>Question 1205408</A>: <I><SPAN STYLE=\"word-break: break-all;\"> . A privately owned liquor store operates both drive-in facility and walk-in facility. On randomly selected day, let X and Y, respectively, be the proportion of the time that the drive-in and walk  -  in facilities are in us, and suppose that the joint density function of these random variable is <BR>\n" );
document.write( "   f(x,y)  = {2/3 (x+2y)        0 ≤x ≤1,0 ≤y ≤1  0                                elsewhere. \r<BR>\n" );
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document.write( "a. Find the marginal density of X<BR>\n" );
document.write( "b. Find the marginal density of Y<BR>\n" );
document.write( "c. Find the probability that the drive-in facility is busy less than one half of the time.\r<BR>\n" );
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