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Andrei [34K]
4 years ago
12

A bag contains three white marbles, two black marbles, and five red marbles. Find the probability of picking a black marble

Mathematics
2 answers:
Klio2033 [76]4 years ago
7 0
Well, there is 10 marbles in total and there is 2 black marbles. So, you get 2/10 but you need to simplify it and then you get 1/5. 
DerKrebs [107]4 years ago
3 0

Answer:  0.2

Step-by-step explanation:

Given : The number of black marbles in the bag = 2

The total number of marbles in the bag = 3+2+5=10

Then , if one marble is drawn from  the bag ,the probability of picking a black marble will be :-

\text{P(Black)}=\dfrac{\text{Number of black marbles}}{\text{Total marbles}}\\\\\Rightarrow\text{P(Black)}=\dfrac{2}{10}=0.2

Therefore, the the probability of picking a black marble =0.2

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8 players to 10 players
solong [7]

Answer:

"I don't understand what this means but I will take my best shot, I guess, this is my answer based on the small amount of words this question gives"

Depending on skill level either of them could win, for example if the 10 players are able to overwhelm the 8 players they will win, but if the 8 players have better players they could win, depending on their skill, even though the 10 player team has a better chance to win, the 8 player team could win.

3 0
3 years ago
Determine if each statement is true or false. If the statement is false, explain why, or show work proving that it is false.
kherson [118]

Answer:

a). true

b). true

Step-by-step explanation:

a).

Given : If a = 5, then ac = 5c

            Let c be any constant.

            a = 5 (given)

            Therefore, ac = 5c

Here a  is given a constant value (5), also let assume c to be a constant. So when we multiply each term we will get a constant value of 5c. The ratio does not change.

Hence proved.

b).

Given : If ac = 5c, then a = 5

            Let c be any constant

            It is given, a = 5

Therefore, ac = 5c

Here the product of two terms is given as 5c, where c is assume to be a constant. Then as a product rule, the value of a will be 5. The ratio will not change.

Hence proved.

7 0
3 years ago
Sam had a water bottle it can hold 0.3 liters how many milliliters can it hold
kow [346]
I believe it is 300 milliliters, because liters are 1000 times bigger than milliliters.  I hope I am correct.  
5 0
3 years ago
Which sample fairly represents the population? Check all that apply. measuring the heights of every fiftieth person on the schoo
LenKa [72]
A sample is a small subset of a population, on which startistical analysis is carried out to obtain the characteristics of the population.

Sampling is the process of selecting units (e.g., people, organizations) from a population of interest to obtain the characteristics of the population.

When drawing a sample, it is important that all the components of the population of interest is adequately represented.

Thefollowing samples are categorised based on whether they fairly represent the population of interest or not.

1.) M<span>easuring the heights of every fiftieth person on the school roster to determine the average heights of the boys in the school.

Here, the population of interest is the boys in the school. Drawing a sample of every fiftieth person on the school roster will contain both boys and girls whereas girls are not needed for the purpose of the survey.

Threfore, the sample does not represent fairly the population of interest.

2.) C</span><span>alling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment.

Here, the population of interest is the team members, so drawing a sample of every third person on the soccer team's roster represents fairly the population of interest.

3.) </span>O<span>bserving every person walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glasses.

Here the population of interest is people who wear glasses, though observing people walking down the road might be a good way to drawing this sample, but the sample will be biased because by 5 pm, the sum will be down and the people who wear glasses because of the sun might not have their glasses on again.

So this sample does not fairly represent the population of interest.

4.) </span>Sending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the town.

Here, the population of interest is the residents of the town and not all residents of the town might be a parent.

So, the sample of one-hundredth parent in the school district does not fairly represent the population of interest.

5.) T<span>aking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch.

Here, the population of interest is the students and taking a poll in the lunch room (where all students currently have to eat lunch) fairly represent the population of interest.


Therefore, the samples that fairly represent the population are:
</span>
<span>C<span>alling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment.
and
</span></span>T<span>aking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch.</span>
6 0
3 years ago
Suppose that on the average, 7 students enrolled in a small liberal arts college have their automobiles stolen during the semest
Galina-37 [17]

Answer:

P(x>1)=0.9927

Step-by-step explanation:

From the question we are told that:

Mean \=x =7

Generally the Poisson equation for \=x is mathematically given by

P(x>1)=1-P(x \leq 1)

Therefor

P(x>1)=1-(\frac{e^{-7}*7^0}{0!}+{\frac{e^{-7}*7^1}{1!})

P(x>1)=1-(9.1*10^{-4}+6.3*10^{-3})

P(x>1)=1-(7.3*10^{-3}

P(x>1)=0.9927

3 0
3 years ago
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