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3 years ago

What is the theoretical probability of rolling a 2

Mathematics

2 answers:

Ainat [17]3 years ago

3 0

10% you welcome :-) :-) :-) :-)

azamat3 years ago

3 0

1/6 if u r rolling a die

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Simplify 2452.5<br> Plz help me

Aleks04 [339]

Answer:

the answer will stay the same

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2 years ago

You draw one card from a standard 52-card deck. In how many ways could the card be face card or a six?

Nady [450]

16/25 because there are 3 face cards which have 4 different suits and 4 different suits for the number 6

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3 years ago

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 $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How large an SRS of scores must you choose?

This is at least n, in which n is found when $M = 20, \sigma = 150$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

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

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

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

$\sqrt{n} = 12.3375$

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

$n = 152.2$

Rounding to the next whole number, 153

We need an SRS of scores of at least 153.

8 0

3 years ago

8 divided by 2 (2+2). 1 or 16

laiz [17]

Answer:

Step-by-step explanation:

$8/2(2+2)$

Following the order of operations (PEMDAS), combine the terms in your parentheses:

$8/2(4)$

Remember that we follow the order of operations from left to right.

Divide 8 into 2:

$4(4)$

Multiply:

$16$

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3 years ago

Dylan started with 30 baseball cards and gave away x cards. Sebastian started with 40 cards and gave away twice as many cards as

andre [41]

Answer:

he gave away 5 because if sebastian gave twice as many away and ended up with the same as dylan then it must be 5

4 0

2 years ago

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