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Olenka [21]
3 years ago
9

Find the expected value of the random variable. Round to the nearest cent unless stated otherwise. Suppose you buy 1 ticket for

$1 out of a lottery of 1,000 tickets where the prize for the one winning ticket is to be $500. What is your expected value
Mathematics
1 answer:
QveST [7]3 years ago
5 0

Answer:

Expected Value = - 0.5

Step-by-step explanation:

Expected Value [ E(X) ]  = Σ  {X. Probability (X)} = Σ [ (X).P(X) ]

  • Case 1 : Lottery Won

Probability = 1 / 1000

X Value = 500 - 1 = 499

  • Case 2 : Lottery Lost

Probability =  1 - Probability Winning = 999 / 1000

X Value = -1

  • Expected Value :

(1 / 1000) (499) + (999 / 1000) (-1)

0.499 - 0.999

= - 0.5

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E) distributive property

Because you are distributing the 3 to 2/5x and 7/5y
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2 years ago
Brenda throws a dart at this square-shaped target:
Klio2033 [76]

Answer: See below

Step-by-step explanation:

<u>Area of the square</u>  = l*w = 11*11 = 121  

<u>Area of the circle</u>  = pi r^2 = pi*1^2 =  3.142

<u>Part A</u>

P(hitting the circle) = 3.142 / 121  =  0.026 which is closer to 0.

<u>Part B</u>

P(hitting the outside portion)  = 1 - 0.026 = 0.974 which is closer to 1.  

4 0
2 years ago
Read 2 more answers
Plsss help it’s due today in an hour!!! (test grade)
Rudik [331]

Answer:

the area is 50.24 cm^{2}.

Step-by-step explanation:

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8 0
3 years ago
Which is another way to check the sum of 104+34+228+877?
Alex787 [66]
The answer is digit sum method.

Digit sum method is method used to check the sum of sum numbers. If the sum of all of the digits of numbers is equal to the sum of all of the digits of the total sum, then the arithmetic process was correct.

We need to check the sum of <span>104+34+228+877:
</span>104 + 34 + 228 + 877 = 1243

Let's first summarize the digits of individual numbers:
104 *** 1 + 0 + 4 = 5
34 *** 3 + 4 = 7
228 *** 2 + 2 + 8 = 12 *** 1 + 2 = 3
877 *** 8 + 7 + 7 = 22 *** 2 + 2 = 4

Now, let's sum these sums:
5 + 7 + 3 + 4 = 19 *** 1 + 9 = 10 *** 1 + 0 = <u><em>1</em></u>

Then, let's summarize the digits of the total sum:
1243 *** 1 + 2 + 4 + 3 = 10 *** 1 + 0 = <u><em>1</em></u>

Since the sums of the digits on the both sides of equation is 1, than the arithmetic process was correct and the sum of <span>104 + 34 + 228 + 877 is really 1243.</span>

7 0
3 years ago
HELP PLEASEEE!!!People develop their personal values through_<br> experiences.
Igoryamba
Answer:

Personal experiences.

Explanation:

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8 0
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