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Greeley [361]
3 years ago
5

Every day, the number of network blackouts has a distribution (probability mass function)

Mathematics
1 answer:
boyakko [2]3 years ago
3 0
Expected Mean, E(X), is obtained by multiplying each pair of x and its P(x) and add up the answers

E(X) = (0×0.7) + (1×0.2) + (2×0.1) = 0.4

The formula to calculate the variance, Var(X), is given by E(X)² - (E(X))²

E(X²) = (0²×0.7) + (1²×0.2) + (2²×0.1) = 0+0.2+0.4 = 0.6
(E(X))² = (0.4)² = 0.16

Var(X) = 0.6 - 0.16 = 0.44

Translating these answers into the context we have

E(Y) = 0.4×500 = $200
Var(Y) = $110

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Y_Kistochka [10]

Answer:

0.8

Step-by-step explanation:

We begin with the expression: 0.5+(-\frac{3}{4} )+0.25-(-\frac{4}{5} )

First, we need to convert the fractions into decimals to make this easier.

-\frac{3}{4}=-0.75 and -\frac{4}{5} =-0.8

Once we have this, we can simplify it

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3 years ago
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vodomira [7]

Answer:

m=3/2

look how many units go up and to the side between 2 points

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Step-by-step explanation:

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3 years ago
You are choosing between two health clubs. Club A offers membership for a fee of $ 19plus a monthly fee of $ 21.  Club B off
11111nata11111 [884]

Answer:

For 2 months

Step-by-step explanation:

Let after x months the cost of each health club is same,

Now, In club A,

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Thus, we can write,

19 + 21x = 23 + 20x

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Hence, for 2 months the total cost of each health club would be same.

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3 years ago
5(t+3)=-3.5 solve for t
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Answer: t=−3.7

If I Helped, Please Mark Me As Brainliest, Have A Great Day :D

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