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iVinArrow [24]
3 years ago
14

Solve the given problem. Zara is six years older than half Gary’s age. If Gary is four years old, how old is Zara?

Mathematics
1 answer:
ch4aika [34]3 years ago
7 0

The answer is C. 8

4/2 = 2

2+6 = 8

Let me know if you have any questions!

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Which decimals are less than –0.8? choose all answers that are correct.
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What is the volume of this rectangular prism?
ollegr [7]

Answer:

57,600cm {}^{2}

<em><u>Solving steps:</u></em>

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8 0
2 years ago
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Assume that you assign the following subjective probabilities for your final grade in your econometrics course (the standard GPA
rodikova [14]

Answer:

E(X) = 4*0.2 +3*0.5+ 2*0.2 +1*0.8+ 0*0.02= 2.78

So then the best answer for this case would be:

C. 2.78

Step-by-step explanation:

For this case we have the following probabability distribution function given:

Score         P(X)

A= 4.0       0.2

B= 3.0       0.5

C= 2.0       0.2

D= 1.0        0.08

F= 0.0       0.02

______________

Total          1.00

The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.

If we use the definition of expected value given by:

E(X) = \sum_{i=1}^n X_i P(X_I)

And if we replace the values that we have we got:

E(X) = 4*0.2 +3*0.5+ 2*0.2 +1*0.8+ 0*0.02= 2.78

So then the best answer for this case would be:

C. 2.78

3 0
3 years ago
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