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Rzqust [24]
2 years ago
14

Marcos and Amaya work at a mobile phone company that offers customers an optional care plan. Customers can choose to pay an extr

a $50 when they buy a new phone, and if they damage their screen, then the company will cover the cost of the repair. Marcos and Amaya let X represent their company's net gain on the sale of a given care plan, and they find the expected value of X is E(X)=$25.
Marcos says, "If we sell many of these care plans, the average gain for our company will be about $25 per plan."
Amaya says, "For every 1,000 customers who buy this care plan, we can expect a net gain of about $25,000."
Whose statement is correct based on the expected value?
Mathematics
2 answers:
Pachacha [2.7K]2 years ago
7 0

According to the given expected value, it is found that Marcos' statement is correct.

  • The interpretation of the <em>expected value</em> is that <u>over a large number of trials, the average value will be close to the expected value</u>.

In this problem:

  • The expected value is of $25.
  • Hence, if many of the plans are sold, the average profit per plan will be of $25, and Marcos' statement is correct.

About Amaya's statement, among groups of 1,000 customers there can be variations, hence, she is incorrect.

You can learn more about the interpretation of the expected value at brainly.com/question/25928679

Andrews [41]2 years ago
6 0

Answer:

both are correct, done on kahnnnnnnnnnnnnnnn

Step-by-step explanation:

owo

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Likurg_2 [28]

Answer:

you can do a trial and improvement

Step-by-step explanation:

8 0
3 years ago
What value of x is in the solution set of 2x - 3 &gt; 11 - 5x<br><br><br> -3<br> 0<br> 2<br> 4
Misha Larkins [42]

<u>Answer:</u>

The answer is D : 4.

<u>Step-by-step explanation:</u>

<em>=2x-3>11-5x</em>

<em>=2x-3+5x>11</em>

<em>=7x-3>11</em>

<em>=7x>11+3</em>

<em>=7x>14</em>

<em>=7x/7>14/7</em>

<em>=x>2</em>

<em />

<em />

<em>By simplifying the problem, you can see that "x" </em><em><u>must</u></em><em> be greater than 2. Therefore, eliminating all other possible answers that are shown, but 4. </em>

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4 0
3 years ago
Read 2 more answers
−2x=x2−6 Rewrite the equation by completing the square.
V125BC [204]

Answer:

(x + 1)² = 7

Step-by-step explanation:

Given:

-2x = x² - 6

We'll start by rearranging it to solve for zero:

x² + 2x - 6 = 0

The first term is already a perfect square so that's fine.  Normally, if that term had a non-square coefficient, you would need to multiply all terms a value that would change that constant to a perfect square.

Because it's already square (1), we can simply move to the next step, separating the -6 into a value that can be doubled to give us the 2, the coefficient of the second term.  That value will of course be 1, giving us:

x² + 2x + 1 - 1 - 6 = 0

Now can group our perfect square on the left and our constants on the right:

x² + 2x + 1 - 7= 0

x² + 2x + 1 = 7

(x + 1)² = 7

To check our answer, we can solve for x:

x + 1 = ± √7

x = -1 ± √7

x ≈ 1.65, -3.65

Let's try one of those in the original equation:

-2x = x² - 6

-2(1.65) = 1.65² - 6

- 3.3 = 2.72 - 6

-3.3 = -3.28

Good.  Given our rounding that difference of 2/100 is acceptable, so the answer is correct.

6 0
3 years ago
teddy cuts grass for $20 a grass and garvin cuts grass for 18 a lawn. their total combined revenue was $348. teddy made $132 mor
Katarina [22]
The x= the cut for the grass
The y=garvin cuts

348=20x+18y
132=18+x

4 0
3 years ago
In a random sample, 3 of 400 computer chips are defective. Based on
Ne4ueva [31]

Answer:

750 of 100,000 chips would be expected to be defective.

Step-by-step explanation:

(3/400) and (?/100,000)

100,000 ÷ 400 = 250.

Multiply 250 by 3 to find the number of defective chips.

250 x 3 = 750.

5 0
3 years ago
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