Let's calculate the required statistical measures for both portfolios.

Step 1: Calculate the mean annual return for Portfolio A.

Portfolio A Annual Returns: 5%, 8%, -2%, 7%, 10%

The mean is calculated as:

$\text{Mean of Portfolio A} = \frac{5 + 8 - 2 + 7 + 10}{5} = \frac{28}{5} = 5.6\%$

So, the correct answer for Question 116 is: A) 5.6%

Step 2: Calculate the mean annual return for Portfolio B.

Portfolio B Annual Returns: 6%, 7%, -1%, 9%, 5%

The mean is calculated as:

$\text{Mean of Portfolio B} = \frac{6 + 7 - 1 + 9 + 5}{5} = \frac{26}{5} = 5.2\%$

So, the correct answer for Question 117 is: C) 5.2%

Step 3: Calculate the median annual return for Portfolio A.

To find the median, we first arrange the returns in ascending order:

Sorted Returns for Portfolio A: -2%, 5%, 7%, 8%, 10%

The median is the middle value:

$\text{Median of Portfolio A} = 7\%$

So, the correct answer for Question 118 is: B) 7%

Step 4: Calculate the range of the annual returns for Portfolio B.

Portfolio B Annual Returns: 6%, 7%, -1%, 9%, 5%

To find the range, we first determine the minimum and maximum values:

$\text{Range of Portfolio B} = 9\% - (-1\%) = 10\%$

So, the correct answer for Question 119 is: C) 10%

Step 5: Calculate the new arithmetic mean for Portfolio B with an added investment returning 18%.

Including the new return:

Updated Portfolio B Returns: 6%, 7%, -1%, 9%, 5%, 18%

The new mean is calculated as:

$\text{New Mean of Portfolio B} = \frac{6 + 7 - 1 + 9 + 5 + 18}{6} = \frac{44}{6} = 7.33\%$

So, the correct answer for Question 120 is: D) 7.3%

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Do you have any questions or need further clarification?

Here are some related questions:

1. What is the variance of the returns for Portfolio A?
2. How does the standard deviation of Portfolio B compare to Portfolio A?
3. If Portfolio A had an additional year with a 15% return, what would be its new mean return?
4. How would the inclusion of an outlier affect the median return in Portfolio B?
5. What is the percentage difference between the mean returns of Portfolio A and Portfolio B?

Tip: When comparing portfolios, both mean return and volatility (standard deviation) are important to understand the risk and return balance.