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OpenStudy (anonymous):
Help please.. Medal and Fan :) The independent random variables X and Y are such that X has a mean 8 and variance 4.8 and Y has a poisson distribution with mean 6. Find (i) E(2X-3Y), (ii) Var(2X-3Y)
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OpenStudy (amoodarya):
hint : \[E[ax+by]=aE[x]+bE[y]\\\] for the second part \[cov[x,y]=0\] because they are independent
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