Answer:
is that all?
Step-by-step explanation:
Answer:
12 is the answer
Step-by-step explanation:
FIRST do 23 - 11 and you will find your answer
Answer:
-105
Step-by-step explanation:
a negative times a negative makes it positive so -15(7) which would just equal -105
Answer:
a. E(x) = 5.2000%
b. Variance = 122.16
Standard Deviation = 11.05
Step-by-step explanation:
Given
Scenario Probability Rate of Return
1 0.20 −16 %
2 0.40 7 %
3 0.40 14 %
a.
Expected Rate of Return = E(x)
E(x) = (-16% * 0.20) + (0.40 *7%) + (0.40 * 14%)
E(x) = -3.2% + 2.8% + 5.6%
E(x) = 5.2%
E(x) = 5.2000%
b.
Variance also known as the average of the squared differences from the Mean.
To calculate variance, start by calculating the mean, or average, of your sample. Then, subtract the mean from each data point, and square the differences. Next, add up all of the squared differences
Variance =
V = σ²= (−16 − 5.2)² * 0.20 + (7 − 5.2)² * 0.40 + (14 − 5.2)² * 0.40
V = σ² =122.16
Standard Deviation = σ = √SD
σ = √122.16
σ = 11.05124427383631
σ = 11.05 --- Approximated
Because the two triangles are similar, one is a scaled down version of the other.
You can figure out that scale by comparing two matching sides, in this case AD and AB.
AD = 2 and AB = 2+4 = 6
So 2/6 = 1/3, telling us each side of the smaller triangle is 1/3 the size of the original.
Now we need to find ED and know CB = 12. Knowing ED = 1/3 of CB:
ED = 1/3 • 12 = 4