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3 years ago

A binomial probability has p=.20 and n=100, what are the mean and standard deviation?

Mathematics

1 answer:

pychu [463]3 years ago

4 0

Mean: $np=100\times0.20=20$

Standard deviation: $\sqrt{np(1-p)}=\sqrt{100\times0.20\times0.80}=4$

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Assume that the sales of a certain appliance dealer can be approximaed y sraig were $6000 in 1982 and $ 64,000 in 1987. Let x -

viktelen [127]

Answer:

$y=11,600x+6,000$

Yearly sales in 1990: $98,800.

Step-by-step explanation:

We have been given that the sales of a certain appliance dealer can be approximated by a straight line. Sales were $6000 in 1982 and $ 64,000 in 1987.

If at 1982, $x=0$ then at 1987 x will be 5.

Now, we have two points (0,6000) and (5,64000).

$\text{Slope}=\frac{64,000-6,000}{5-0}$

$\text{Slope}=\frac{58,000}{5}$

$\text{Slope}=11,600$

Now, we will represent this information in slope-intercept form of equation.

$y=mx+b$ , where,

m = Slope,

b = Initial value or y-intercept.

We have been given that at $x=0$ , the value of y is 6,000, so it will be y-intercept.

Substitute values:

$y=11,600x+6,000$

Therefore, the equation $S=11,600x+6,000$ represents yearly sales.

Now, we will find difference between 1990 and 1982.

$1990-1982=8$

To find yearly sales in 1990, we will substitute $x=8$ in the equation.

$S=11,600(8)+6,000$

$S=92,800+6,000$

$S=98,800$

Therefore, the yearly sales in 1990 would be $98,800.

6 0

3 years ago

Adams sister want to watch her intake of fat per day.he estimate that the dinner will have 48grams of fat.what percentage of her

zaharov [31]

You have to figure out what 48 percent of 70 is.
Use the formula percent/of = x/100.
So, 48/70 and x/100 you cross multiply the numbers; 48*100 and 70*x and end up with 70x=4800.
Divide both sides by 70, which gives you 68.57.
Round the number up to 69 percent.

4 0

3 years ago

What is the service call charge?

atroni [7]

A service call charge or fee is when you are charged a certain amount of money in order for a service technician to perform that specfic service.

6 0

3 years ago

Find the value of x. 3 x = [?]

satela [25.4K]

Answer:

Step-by-step explanation:

According to Euclidian theorem h^2 = 3*x (h : height)