Answer:
a. The Coefficient of variation is expressed as;
= Standard Deviation/Expected return
Choice A
= 1,520/1,870
= 0.813
Choice B
= 840/2,000
= 0.42
Choice C
= 710/1,590
= 0.447
b. The coefficient of variation measures the volatility of the return of the investment. The more volatile it is, the more risky it is. A risk Averse investor would go for the one with the least Coefficient which is Choice B in this case.