Question: Multiply contents of vector to get expected value


This worksheet by Jason Schattman, I cant work out how he gets vector r, the expected value (in bold). I did ask him. Anybody shed any light?

I thought EV was calculated by averaging each stocks yearly returns. EV for Q[1] is (0.08-0.2+.05)/3   (<> 0.05)

Obviously i'm going to get a different r to him, but out of interest what maple commands do i need to convert Q into r using my method for EV?


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