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3 years ago

5

In a bag of marbles, you have 4 green, 3 yellow, 5 blue, and 8 red marbles. What is the probability of picking a green marble fr

om the bag?

2 answers:

Marina86 [1]3 years ago

8 0

25% or 1/4 in chance. 4 marbles and 16 other colours. 4/16=1/4=25%

BaLLatris [955]3 years ago

7 0

Answer:

u have a 4/20 chance AKA a 20% chance

Step-by-step explanation:

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Suppose that a jewelry store tracked the amount of emeralds they sold each week to more accurately estimate how many emeralds to

Marysya12 [62]

Answer:

The mean is 2.75.

The margin of error is 0.62.

Step-by-step explanation:

In this case, we know the 95% confidence interval, and we want to know the mean and the margin of error.

The mean can be calculated as the average between the upper limit and lower limit:

$\mu=\frac{UL-LL}{2}=\frac{3.37+2.13}{2}=\frac{5.5}{2}=2.75$

The margin of error is the difference between the upper (or lower limit) and the mean. It equals the product between the z-value and the standard deviation divided by the square of the sample size.

It can also be calculated as half the difference of the limits of the confidence interval.

We only have the limits of the confidence interval to calculate the margin of error:

$ME=z\sigma/\sqrt{n}=\frac{UL-LL}{2}=\frac{3.37-2.13}{2}=\frac{1.24}{2}= 0.62$

5 0

3 years ago

The store is 5/6 miles from Yuri’s house. The bank is 2/5 the distance from Yuri’s house to the store. How many miles is the ban

Masja [62]

1/3 miles

You can get this by multiplying the two numbers together which will give you 10/30. That can then be simplified.

8 0

3 years ago

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Sedaia [141]

You have to get the same denominator

8 0

3 years ago

Students who attend Washington Middle School are either in seventh or eighth grade. At the end of the first semester 25% of the

Irina18 [472]

Answer:

There are <u>1240</u> students who attended Washington Middle School.

Step-by-step explanation:

Given:

Students who attend Washington Middle School are either in seventh or eighth grade.

At the end of the first semester 25% of the students at Washington Middle School were on the honor roll.

Seventh graders represented 60% of the students on the honor roll.

If 124 students on the honor roll were in eighth grade.

Now, to find the students attend Washington Middle School.

Let the total number of students be $x.$

So, the students at Washington Middle School were on the honor roll:

<u><em>25% of </em></u> $x$ <u><em /></u>

$=\frac{25}{100} \times x$

$=\frac{25x}{100}$

$=\frac{x}{4}$

As, given seventh graders represented 60% of the students.

So, the students on the honor roll represented as seventh graders:

$60\%\ of\ \frac{x}{4}$

$=\frac{60}{100} \times \frac{x}{4}$

$=0.6\times \frac{x}{4}$

$=\frac{0.6x}{4}$

As, 124 students on the honor roll were in eighth graders.

Thus,

According to question:

$\frac{x}{4} -\frac{0.6x}{4} =124$

$\frac{x-0.6x}{4} =124$

$\frac{0.4x}{4} =124$

<em>Multiplying both sides by 4 we get:</em>

$0.4x=496$

<em>Dividing both sides by 0.4 we get:</em>

$x=1240.$

Therefore, there are 1240 students who attended Washington Middle School.

6 0

4 years ago

What represents 200 million<br>

sattari [20]

Answer:

200 million represents a very large number and therefore it is not commonly encountered in the history of the people of God. However, is reflected in the number of silver coins annually paid by the vinedressers who farmed King Solomon's vineyards (ie, 1,000 x 1,000 x 200).

4 0

3 years ago