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May 17th, 2010, 07:47 AM  #1 
Newbie Joined: May 2010 Posts: 1 Thanks: 0  Normal distribution with 2 random variables
hi all, will anyone help me to work this sum out? If X and Y are independent normal variables having a common mean ? such that P(2X + 4Y <= 10) + P(3X + Y <=9) = 1 and P(2X  4Y <= 6) + P(Y  3X >= 1) = 1 Determine the value of ? and the ratio of the variance of X and Y. 

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distribution, normal, random, variables 
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