MATHEMATICS HIGH SCHOOL

A fruit seller purchased 20 kg of apples at Rs 80 per kg and sold them at Rs 85 per kg. find profit and profit percent

Answers

Answer 1

Answer:

Answer:

Profit = Rs 100

Profit %age = 6.25%

Step-by-step explanation:

Cost Price = Rs 80

Cost Price for 20 kg = Rs 1600

Selling Price = Rs 85

Profit for 1 kg = Rs 85 - Rs 80

=> Rs 5 (For 1 Kg)

Profit for 20 kg:

=> Rs 5*20

=> Rs 100

Now Profit %age:

=> $(100)/(1600)* 100$

=> 0.0625 * 100

=> 6.25%

Answer 2

Answer:

Step-by-step explanation:

profit =S.P-C.P

C.P=20×80

=Rs1600

S.P=20×85

=Rs1700

=1700-1600

=Rs 100

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A teacher wants to compare the mean geology scores of two different classes. She is testing the null hypothesis that there is no difference in the population mean scores of the two classes. The difference of the sample means is 51.4. If the standard deviation of the distribution of the difference of sample means is 16.66, what is the 95% confidence interval for the population mean difference? A. between -33.2 and +33.2 B. between -49.9 and +49.9 C. between -102.8 and +102.8 D. between -154.2 and +154.2

Answers

Answer:

Standard deviation(S.D) = √{Mean difference(D²) - Mean(M)}

S.D.= 16.6

Step-by-step explanation: A) M =33.2

∴ S.D = √D² - 33.2

16.66 = √D² - 33.2

D² = 16.66² + 33.2 = 277.56 - 33.2 = 244.36

∴D = √244.36 = 15.6

B) M= 49.9

∴ S.D.=√D² + 49.9

16.6 =√D² + 49.9

D² = 16.6² + 49.9 = 277.56 + 49.9 = 327.46

∴ D = √327.46 = 18.1

C) M = 102.8

∴ S.D. =√D² + 102.8

16.66 =√D² + 102.8

D² = 16.66² + 102.8 = 277.56 + 102.8 = 380.36

∴ D =√380.36 = 19.5

D) M = 154.2

∴ S.D. = √D² + 154.2

16.66 =√D² + 154.2

D² = 16.66² + 154.2 =277.56 + 154.2 = 431.76

D =√431.76 = 20.8

a. between -33.2 and +33.2 .

How far from zero would you move on the x-axis to reach the point (10,8)

Answers

Answer:

You would move 10 units to the right from zero on the x-axis

Answer:

10 spaces to the right to get to 10 and up 8 to get to 8

Coin is tossed and a number cube is rolled. What is the probability that the coin shows heads and the number cube shows 5?1/6
1/12
2/3
1/4

Answers

Hello,

1/2 * 1/6=1/12
===============

Solve for r , what is r equal to ?

Answers

Answer:

$r= \sqrt[3]{(3V)/(4\pi)}$

Step-by-step explanation:

$V = (4)/(3) \pi r^3 \n\n3V = 4\pi r^3 \n\nr^3 = (3V)/(4\pi)\n\n\huge \purple {r= \sqrt[3]{(3V)/(4\pi)}}$

In a survey, 15 high school students said they could drive and 15 said they could not. Out of 60 college students surveyed, 30 said they could drive. Micah concluded that if someone is in college, that means the person is more likely to drive. Is Micah’s conclusion correct? Explain

Answers

No, Micah is not correct. Since there are equal numbers of people in each group who drive and who do not drive, the relative frequency for each is 50%. Because the relative frequencies are the same, there is no association between the variables.

Based on the survey figures by Micah of the college students who could drive, we can infer that Michah's conclusion is not correct.

Why is Michah not correct?

Out of 60 college students surveyed, only 30 said they could drive. This means that only 50% could drive:

= 30 / 60

= 50%

A 50% relative frequency is not good enough to make the conclusion that one is more likely to drive in college. Rather it means that they are equally likely to drive or not to drive.

Find out more on relative frequency at brainly.com/question/3857836.

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A square mosaic tile has the length of 48 mm.

What is the area of the tile?