A. Wages is the general term for the payments for the use of resources
Answer:
the Expected rate of return will be 8.2%
the variance will be 0.001296
Explanation:
We will calculate the Expected Rate of Return which is the sum of the wieghted return based on their probabilities:
return of 0.15 probability 20% = 0.03
return of 0.07 probability 70% = 0.049
return of 0.03 probability 10% = 0.003
expected return = 0.082 = 8.2%
Now to calculate the variance we do:
∑(rk-ERR)^2 x pk
The sum of the difference between the expected rate and the escenario rate, power two, and multiply by their posibility

the variance will be: 0.001296
Answer:
C. A risk averse investor would choose the economy in which stock returns are independent because risk can be diversified away in a large portfolio.
Explanation:
if stock prices move together, (positive correlation), the volatility of the portfolio will be higher. Higher volatility means higher risk. This is the case with the first economy.
In the second economy however, the stocks are independent of each other meaning there is zero correlation between stocks and hence the portfolio volatility will be much lesser.
As a risk-averse investor you will prefer the portfolio with lower volatility for the same expected return.
Answer:
1) Flitcom Corp (Beta = 0.60)
2) Tobotics Inc. (s.d. = 11%)
Explanation:
1. Suppose all stocks in Ariel's portfolio were equally weighted. Which of these stocks would contribute the least market risk to the portfolio?
The indicator of the market risk is the Beta. It relates the variation of the price or value of the stock relative to the variation of the total stocks in the market.
The value of Beta indicates how risky is a stock relative to the risk of the market. A Beta =1 means it has the same systemic risk as the market. If Beta<1, the stock is less volatile than the market, and if Beta>1, it is more volatile than the market.
Then, the stock with less value of Beta will contribute the least risk to the portfolio.
This is the case of Flitcom Corp (Beta=0.60)
2. Suppose all stocks in the portfolio were equally weighted. Which of these stocks would have the least amount of stand-alone risk?
The stand-alone is reflected by the standard deviation. The less the standard deviation, the less risk of the stock (measured only the stock variability).
This is the case of Tobotics Inc. (s.d. = 11%)