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Ludmilka [50]
3 years ago
9

How do i work this problem...show examples

Mathematics
1 answer:
belka [17]3 years ago
8 0
Could you show the problem, please? :)
You might be interested in
A bag has five red stones two green three blue six yellow and four purple stones what is the probability of choosing a yellow st
Y_Kistochka [10]

Answer:

Probability of picking yellow stones from the bag is 0.3.

Step-by-step explanation:

Given:

Number of red stone in bag = 5

Number of green stone in bag = 2

Number of blue stone in bag = 3

Number of yellow stone in bag = 6

Number of purple stone in bag = 4

We need to find the probability of choosing yellow stone from the bag.

Solution:

First we will find the Total number of stones in the bag.

Total number of stones in the bag is equal to sum of Number of red stone in bag ,Number of green stone in bag, Number of blue stone in bag, Number of yellow stone in bag and Number of purple stone in bag.

framing in equation form we get;

Total number of stones in the bag = 5+2+3+6+4 =20

Now Probability of picking yellow stones from the bag  can be calculated by  dividing Number of yellow stone in bag by Total number of stones in the bag.

framing in equation form we get;

P(Y) =\frac{6}{20}= 0.3

Hence Probability of picking yellow stones from the bag is 0.3.

4 0
3 years ago
The brain volumes ​(cm cubedcm3​) of 50 brains vary from a low of 922922 cm cubedcm3 to a high of 14961496 cm cubedcm3. use the
vesna_86 [32]
The range rule of thumb is that the range is four times the standard deviation. The range in this case is 922 cubic cm to 1496 cubic cm, i.e., 574 cubic cm.
Therefore, according to the rule, the standard deviation is 574 cubic cm/4 = 
143.5 cubic cm. The actual standard deviation is 161.7 cubic cm. The difference is 161.7 - 143.5 = 18.2. Since this is greater than 15 cubic cm, the rule in this case is not accurate.
4 0
3 years ago
Find the tax and total cost of a $336.99 airline ticket with a sales tax of<br> 6%.
Serga [27]

$357.2094

rounded: $357.21

8 0
3 years ago
A researcher is interested in estimating the mean blood alcohol content of people arrested for driving under the influence. Base
UNO [17]

Answer:

We need a sample size of at least 650

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{1-0.95}{2} = 0.025

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 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error 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.

In this problem:

We need a sample of size at least n

n is found when M = 0.005, \sigma = 0.065

So

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

0.005 = 1.96*\frac{0.065}{\sqrt{n}}

0.005\sqrt{n} = 1.96*0.065

\sqrt{n} = \frac{1.96*0.065}{0.005}

(\sqrt{n})^{2} = (\frac{1.96*0.065}{0.005})^{2}

n = 649.23

Rounding up

We need a sample size of at least 650

7 0
3 years ago
I need help with the rest of my algebra fraction homework on Page's 11,12,14, 16 and 18. Is there anybody willing to help me wit
mrs_skeptik [129]

Answer:

11. B

12. A

14. C

16. D

18. A

8 0
4 years ago
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