P0072_Soln - EX [ ] = 1 p = 1 0.2 = 5 EY = 1 p = 1 0.6 =...

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P0072_Soln.doc Mean of RV formed by adding two RVs is always equal to the sum of the means of those RVs: EX + Y [ ] = EX [] + EY [] The expected value of each RV is easily found since they are geometric RVs:
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Unformatted text preview: EX [ ] = 1 p = 1 0.2 = 5 EY = 1 p = 1 0.6 = 1.67 EX + Y [ ] = EX + EY = 5 + 1 .67 = 6 .67...
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