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anzhelika [568]

4 years ago

5

How to simplify (n+2)!/n! I will mark brainliest and give a thanks!

1 answer:

borishaifa [10]4 years ago

7 0

It would be (n+2) (n+1)

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May someone please help me

wel

Answer:

ok but helppp meeeee nothinggggg

4 0

3 years ago

What is the solution of the equation x − 2 = 29?<br> -31<br> -27<br> 27<br> 31

Allisa [31]

31-2=29 you add 2 to both sides so -2 cancels and you are left with X=31

the answer is 31

5 0

3 years ago

7. If the perimeter of a square is 14g +28 inches, what is the length, in inches, of each side of

AleksandrR [38]

Answer:

3.5x+7

Step-by-step explanation:

divide your coeeficients by 4

5 0

3 years ago

It is known that 50% of adult workers have a high school diploma. If a random sample of 8 adult workers is selected, what is the

son4ous [18]

Answer:

85.56% probability that less than 6 of them have a high school diploma

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they have a high school diploma, or they do not. The probability of an adult having a high school diploma is independent of other adults. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

50% of adult workers have a high school diploma.

This means that $p = 0.5$

If a random sample of 8 adult workers is selected, what is the probability that less than 6 of them have a high school diploma

This is P(X < 6) when n = 8.

$P(X < 6) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{8,0}.(0.5)^{0}.(0.5)^{8} = 0.0039$

$P(X = 1) = C_{8,1}.(0.5)^{1}.(0.5)^{7} = 0.0313$

$P(X = 2) = C_{8,2}.(0.5)^{2}.(0.5)^{6} = 0.1094$

$P(X = 3) = C_{8,3}.(0.5)^{3}.(0.5)^{5} = 0.2188$

$P(X = 4) = C_{8,4}.(0.5)^{4}.(0.5)^{4} = 0.2734$

$P(X = 5) = C_{8,5}.(0.5)^{5}.(0.5)^{3} = 0.2188$

$P(X < 6) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5) = 0.0039 + 0.0313 + 0.1094 + 0.2188 + 0.2734 + 0.2188 = 0.8556$

85.56% probability that less than 6 of them have a high school diploma

7 0

3 years ago

StatTutor: Population versus sample Officials of a major university want to know what percent of their students recycle paper. T

love history [14]

Answer:

Whether the student recycle the paper or not.

Step-by-step explanation:

We are given the following in the question:

Officials of a major university want to know what percent of their students recycle paper.

A random sample of sample size 200 is taken.

We have to find the variable that is measure on each student of the sample.

Variable of measurement on each student:

Whether the student recycle the paper or not.

The student will reply a yes or no as an answer.

3 0

4 years ago