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Sonja [21]
3 years ago
13

You have to pick 5 members of the student council to go to meeting. If there are 10 members total, how many 5 member teams can y

ou pick?
Mathematics
1 answer:
rodikova [14]3 years ago
7 0
2 becuae......................................................................................................you have 5/10
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The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 2643 miles, with a standard
musickatia [10]

Answer:

P(2643-51< \bar X < 2643+51)= P(2592< \bar X

And we can use the z scoe formula given by:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And if we find the z score for the limits we got:

z = \frac{2592-2643}{\frac{368}{\sqrt{44}}}= -0.919

z = \frac{2694-2643}{\frac{368}{\sqrt{44}}}= 0.919

And this probability is equivalent to:

P(-0.919

Step-by-step explanation:

For this case we can define the random variable X as "number of miles between services" and we know the following info given:

\mu = 2643 , \sigma = 368

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

We select a random sample size of n =44. And we want to find this probability:

P(2643-51< \bar X < 2643+51)= P(2592< \bar X

And we can use the z scoe formula given by:

z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And if we find the z score for the limits we got:

z = \frac{2592-2643}{\frac{368}{\sqrt{44}}}= -0.919

z = \frac{2694-2643}{\frac{368}{\sqrt{44}}}= 0.919

And this probability is equivalent to:

P(-0.919

4 0
3 years ago
What is the mechanical advantage of the screw shown below?
algol13

Answer:

C. 8.0

Step-by-step explanation:

The mechanical advantage is got from dividing the circumference of the shaft by the pitch of the screw.

Therefore, the circumference= 2πr

                                                  =2×π×2.3mm

                                                   =14.45mm

Mechanical advantage=14.45mm/1.8mm

=8.03

7 0
3 years ago
Tammy spent $250 on a new coffee table and $148 a new rug.She gave the clerk $500.How much change did she receive?
Bess [88]

Answer:

$102

Step-by-step explanation:

250 + 148 = 398

500 - 398 = 102

7 0
3 years ago
Read 2 more answers
Ms. Hill goes to a burger place in California and orders 5 hamburgers and 3 fries and 6 hamburgers and 2 fries. What could she d
tamaranim1 [39]
She can order 11 burgers and 5 orders of fries
4 0
3 years ago
Please help ASAP! <br> X= <br><br> A) 4<br> B) 7<br> C) 9
melisa1 [442]

Answer:

C) x = 9

Step-by-step explanation:

When two segments intersect in a circle like so, the product of the two parts of one segment will be equal to the product of the two parts of the other segment.

So,<em> 3 * 6 = x * 2</em>

Multiply: 18 = x * 2

Divide: x = 9

8 0
3 years ago
Read 2 more answers
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