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k0ka [10]
3 years ago
11

Ten friends want to play a game. They must be divided into three teams with three people in each team and one field judge. In ho

w many ways can they do it?

Mathematics
2 answers:
sertanlavr [38]3 years ago
6 0

Answer:

It is the number of ways you can arrange the letters AAABBBCCCF, indicating that three players are on team A, three on team B, and three on team C, with one the field judge F.

Each different arrangement represents one of the ways you can form three teams of 3 with a field judge.

That number of arrangments, and therefore the number of ways to divide the players as required, is

rodikova [14]3 years ago
6 0
2800

I’ve done this problem before, and the answer is right.

Explanation:
Look at number 10

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9 - b = ? 9 - 8 = 1 So, your answer is 1.

Step-by-step explanation:

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Marco is interviewing classmates for his newspaper article. He needs to interview 30 people. Every interview takes Marco 7.2 min
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12

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8 0
3 years ago
The National Vital Statistics Reports for November 2011 states that U.S. preterm birth rate for 2010 was about 12%. Preterm birt
miskamm [114]

Answer:

0.104 - 1.96\sqrt{\frac{0.104(1-0.104)}{500}}=0.0772

0.104 + 1.96\sqrt{\frac{0.104(1-0.104)}{500}}=0.1308

The 95% confidence interval would be given by (0.0772;0.1308)

Step-by-step explanation:

For this case we can calculate the estimated proportion like this:

\hat p =\frac{52}{500}= 0.104

We can assume that the normal model can be used since we satisfy two conditions:

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n(1-p) = 500*(1-0.104) = 448>10

The confidence level for this case is 95% of confidence, and the significance is given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

Replacing the values we got:

0.104 - 1.96\sqrt{\frac{0.104(1-0.104)}{500}}=0.0772

0.104 + 1.96\sqrt{\frac{0.104(1-0.104)}{500}}=0.1308

The 95% confidence interval would be given by (0.0772;0.1308)

6 0
3 years ago
Read 2 more answers
Consider the dot plot which shows the distribution of data collected on the amount of time Jason sleeps each night. Find the dif
Elina [12.6K]

Answer:

A) 0.2  

Step-by-step explanation:

From least to greatest, the data points are

6, 6, 6, 7, 7, 7, 8, 8, 8, 9

To find the mean, we find the sum of the data points and divide by the number of data points, 10.  The sum of the data points is

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The difference between the mean and the median is

7.2-7 = 0.2.

4 0
3 years ago
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