Perth Industries is studying an asset. The probability distribution of returns for this asset is shown in the following

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 Perth Industries is studying an asset. The probability
distribution of returns for this asset is shown in the
following​ table,
j
Pr
​Return, r
1
0.10
20.00​%
2
0.25
15.00​%
3
0.40
5.00​%
4
0.05
0.00​%
5
.a.  Calculate the expected value of​ return,r​,
for the asset.
b. Calculate the standard​ deviation, σr​,for
the​ asset's returns.
c. Calculate the coefficient of​ variation, CV​, for
the​ asset's returns.