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Ksenya-84 [330]
3 years ago
10

I need the answer plzz now

Mathematics
1 answer:
Verizon [17]3 years ago
6 0

Answer:

Ea and St

Step-by-step explanation:

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There are 12 counters in a bag.
astraxan [27]

Answer:

number of green counters

=12-3+1+2

=6

number of green and yellow counters

=6+2

=8

probability of getting green or yellow counter

=8/12

=2/3

Step-by-step explanation:

5 0
2 years ago
The avocado own a 1/4 acre orchard. Two fifths of the orchard  is planted in orange trees. What fraction of an acre in planted i
Svetlanka [38]
Two\ fifths\ of\ the\ orchard= \frac{2}{5}  \cdot  \frac{1}{4}\  acre= \frac{1}{10} \ acre\\\\Ans.\ 0.1\ acre\  in\ orange\ trees.
5 0
3 years ago
Read 2 more answers
In an examination of purchasing patterns of shoppers, a sample of 16 shoppers revealed that they spent, on average, $54 per hour
Lesechka [4]

Answer:

54-1.64\frac{21}{\sqrt{16}}=45.39    

54 +1.64\frac{21}{\sqrt{16}}=62.61    

So on this case the 90% confidence interval would be given by (45.39;62.61)    

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=54 represent the sample mean  

\mu population mean (variable of interest)

\sigma=21 represent the sample standard deviation

n=16 represent the sample size  

Solution to the problem

The confidence interval for the mean is given by the following formula:

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.90 or 90%, the value of \alpha=1-0.9=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

Now we have everything in order to replace into formula (1):

54-1.64\frac{21}{\sqrt{16}}=45.39    

54 +1.64\frac{21}{\sqrt{16}}=62.61    

So on this case the 90% confidence interval would be given by (45.39;62.61)    

4 0
3 years ago
Subtract 1 + ( - 1 ) - ( - 3 ). Hint: Add the first two numbers, then subtract the -3 from the result of that addition
kykrilka [37]

Answer:

Add 3. Double that. Subtract 4. Cut that in half. Subtract your original number. Your result is 1!

Step-by-step explanation:

I'm guessing, Hope its right.

7 0
3 years ago
If you are driving on the freeway at 55 mph and you travel for 5 hours, how far will you have gone?
alina1380 [7]
275 because 55 times 5 equals 275 ! Hope this helps
8 0
3 years ago
Read 2 more answers
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