Expected return, standard deviation, coefficent of variation

Please see attached.

1-1 A stock's return has the following distribution

Demand of the company Product Probability of this demand occurring Rate of Return if this demand occurs
Weak 0.1 (50%)
Below Average 0.2 (5)
Average 0.4 16
Above Average 0.2 25
Strong 0.1 60
1

Calculate the stock's expected return, standard deviation, and coefficient of variation

USE THE INFORMATION BELOW FOR THE FOLLOWING PROBLEMS Your expectations from a one year investment in HiTech Computers is as follows:
Probability Rate of Return
.15 -.10
.15 -.20
.35 .00
.25 .15
.10 .15
1. What is the expected ret

A sot's return has the following distribution:
Demand for the Probability of this Rate of Return
Company's Products Demand Occurring if This Demand Occurs
Weak 0.1 (50%)
Below average 0.2 (5)
Average 0.4 16
Above average 0.2 25
Strong 0.1 60
1.0
Calculate the stock's expected retur

Suppose the expected returns and standard deviations of stocks A and B are E(R^A)=0.15, E(r^B)=0.25, s^a=0.1, and s^b=0.2, respectively.
a.Calculate the expested return and standard deviation portfolio that is composed of 40 percent A and 60 percent B when the correlation between returns on A and B is 0.5.
b. Calculate the

State Pi kj
1 0.3 20%
2 0.4 5
3 0.3 12
Calculate the expected return for security j.
Calculate the standard deviation for security j.
Calculate the coefficient of variation for security j.

Two securities, X and Y. Determine bases on the info given the AVERAGE RETURN,STANDARDDEVIATION, and COEFFICIENT of VARIATION.
YEAR RETURN X RETURN Y
1995 16.5% 17.5%
1996 14.2%

A stock's return has the following distribution:
Demand for the Probability of This Rate of Return
Company's Products Demand Occuring if This Demand Occurs
Weak 0.1 (50%)
Below Average 0.2

Calculate the expectedreturn,standarddeviation, and C.V. of expected dollar returns for Ditto Copier, given the following distribution of returns:
Probability Return
.20 $50
.50 20
.30 -15

From the below solution, tell me what the coefficient of variation implies? And would you accept this project or not? Why?
The expected NPV is
E(NPV)= sigma Prob*NPV
= 0.05*(-70) + 0.20*(-25) + 0.50*12 + 0.20*20 + 0.05*30
= 3 (million)
The variance of NPV is
VAR = sigma Prob*[NPV -E(NPV)]^2
= 0.05*(-70-3)^2 + 0.

In answering the following questions, it is given that the potential investment has the following range of possible outcomes and probabilities: 10% probability of a -20% return, 40% probability of a 15% return, 40% probability of a 25% return, and a 10% probability of a 50% return.
(a) Calculate the weighted mean of the proba