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ad-work [718]
3 years ago
8

four seniors and six juniors are competing for four places on a quiz bowl team. what is the approximate probability that all fou

r seniors will be chosen at random ?
Mathematics
2 answers:
12345 [234]3 years ago
6 0
The answer is 4 out of 10
uranmaximum [27]3 years ago
3 0

Answer:

The probability is:

                      4/10

Step-by-step explanation:

We are given:

four seniors and six juniors.

Number of seniors=4

Total number of people=10 ( since 6+4=10)

We are asked to fill four places on a quiz bowl team.

We are asked to find the probability that all four seniors will be chosen at random.

The probability is calculated as:

Ratio of the number of seniors to the total number of people.

            Hence, the probability is:

                                4/10

                       

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Answer:

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Step-by-step explanation:

Given the inequality

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Collect the like terms;

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Suppose that scores on the mathematics part of a test for eighth-grade students follow a Normal distribution with standard devia
riadik2000 [5.3K]

Answer:

We need an SRS of scores of at least 153.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

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Now, find M as such

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20 = 1.645*\frac{150}{\sqrt{n}}

20\sqrt{n} = 1.645*150

\sqrt{n} = \frac{1.645*150}{20}

\sqrt{n} = 12.3375

(\sqrt{n})^{2} = (12.3375)^{2}

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We need an SRS of scores of at least 153.

8 0
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The answer is about 60ish. Hope this helped.   :-)
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Answer:

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