Which addition does the model below represent?
5

5 4 3 2 1 0 1 2 3 4
o 3+(-1)
o 3+4
o 3+(-4)
o 3+1

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Ответ:

gabrielrivasgom

13.08.2020

Mathematics

$3,762.98

Step-by-step explanation:

Let's compute first the expectancy E (the expected value) of the investment:

E = 30% of 21,000 + 45% of 24,000 + 25% of 30,000 =

0.3*21,000 + 0.45*24,000 + 0.25*30,000 = $24,600

The standard deviation s is

$\bf s=\sqrt{\frac{(E-21,000)^2+(E-24,000)^2+(E-30,000)^2}{3}}$

When replacing the expectancy in this formula, we get:

$\bf s=\sqrt{\frac{(24,600-21,000)^2+(24,600-24,000)^2+(24,600-30,000)^2}{3}}=\\=3,762.978\approx \$3,762.98$

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Which addition does the model below represent? 5 5 4 3 2 1 0 1 2 3 4 o 3+(-1) o 3+4 o 3+(-4) o 3+1