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3 years ago

Evaluate x1 - x1 + x0 for x = 2. 0 1/2 1 1/2 2 1/2

Mathematics

1 answer:

Marina86 [1]3 years ago

8 0

Answer:

the answer is 0

Step-by-step explanation:

hoped I helped:)

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A particular sale involves four items randomly selected from a large lot that is known to contain 9% defectives. Let X denote th

umka2103 [35]

Answer:

The expected repair cost is $3.73.

Step-by-step explanation:

The random variable X is defined as the number of defectives among the 4 items sold.

The probability of a large lot of items containing defectives is, p = 0.09.

An item is defective irrespective of the others.

The random variable X follows a Binomial distribution with parameters n = 9 and p = 0.09.

The repair cost of the item is given by:

$C=3X^{2}+X+2$

Compute the expected cost of repair as follows:

$E(C)=E(3X^{2}+X+2)$

$=3E(X^{2})+E(X)+2$

Compute the expected value of X as follows:

$E(X)=np$

$=4\times 0.09\\=0.36$

The expected value of X is 0.36.

Compute the variance of X as follows:

$V(X)=np(1-p)$

$=4\times 0.09\times 0.91\\=0.3276\\$

The variance of X is 0.3276.

The variance can also be computed using the formula:

$V(X)=E(Y^{2})-(E(Y))^{2}$

Then the formula of $E(Y^{2})$ is:

$E(Y^{2})=V(X)+(E(Y))^{2}$

Compute the value of $E(Y^{2})$ as follows:

$E(Y^{2})=V(X)+(E(Y))^{2}$

$=0.3276+(0.36)^{2}\\=0.4572$

The expected repair cost is:

$E(C)=3E(X^{2})+E(X)+2$

$=(3\times 0.4572)+0.36+2\\=3.7316\\\approx 3.73$

Thus, the expected repair cost is $3.73.

4 0

3 years ago

When you have 25 numbers, and Jake picks 3 random numbers and puts them back, what is the chance Bob has of picking those 3 numb

tensa zangetsu [6.8K]

Answer:

4 out of 25 percent chance

Step-by-step explanation:

if you divide the number and range them out. That's all i can tell you for now. Kinda busy. sorry

7 0

3 years ago

Factor completely 5x2 + 30x + 50

SSSSS [86.1K]

5(x² + 6x + 10)

That's the best way to factor it

8 0

3 years ago

Read 2 more answers

Given A = {(1, 3)(-1, 5)(6, 4)}, B = {(2, 0)(4, 6)(-4, 5)(0, 0)} and C = {(1, 1)(0, 2)(0, 3)(0, 4)(-3, 5)}, answer the following

ANEK [815]

$B=\{(\boxed{2}\ 0);\ (\boxed{4},\ 6);\ (\boxed{-4},\ 5);\ (\boxed{0},\ 0)\}\\\\(x,\ y)-domain\ is\ "x"\\\\Answer:\ 2.\ Domain\ of\ set\ B:\{2,\ 4,\ -4,\ 0\}$

8 0

3 years ago

The volume of the triangular prism is 54 cubic units.

OverLord2011 [107]

Answer:

x = 3

Step-by-step explanation:

Given:

The volume of the triangular prism : 54 cubic units
The base length: 4 unit
The height of the base: x
The height of the prism : 3x

As we know that, the formula used to find out the volume of a triangular prism is:

V = 1/2 * The base length * The height of the base * The height of the prism

<=> V = 1/2*4*x*3x

In this question we have V = 54 cubic units

<=> 1/2*4*x*3x = 54

<=> $x^{2}$ = 9

<=> x = 3

4 0

3 years ago