Tr Jain & Vk Ohri (2017) Solutions for Class 11 Science Economics Chapter 1 Concept Of Economics And Significance Of Statistics In Economics are provided here with simple step-by-step explanations. These solutions for Concept Of Economics And Significance Of Statistics In Economics are extremely popular among Class 11 Science students for Economics Concept Of Economics And Significance Of Statistics In Economics Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Tr Jain & Vk Ohri (2017) Book of Class 11 Science Economics Chapter 1 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Tr Jain & Vk Ohri (2017) Solutions. All Tr Jain & Vk Ohri (2017) Solutions for class Class 11 Science Economics are prepared by experts and are 100% accurate.

#### Page No 97:

#### Question 1:

Get information from your school office about the CBSE result (2017) for the students of Class XII in your school. Draw a bar diagram (showing their aggregate marks classified as 1st division, 2nd division and 3rd division).

#### Answer:

Division |
I |
II |
III |

Number of students |
25 | 60 | 15 |

#### Page No 97:

#### Question 2:

Collect data on the literacy rate in major states of India. Refer to Census 2011. Present the data in terms of a bar diagram. Write your observations how different states have performed in improving literacy among the masses.

#### Answer:

States |
Literacy Rate |

Andhra Pradesh (A.P.) Bihar Uttar Pradesh (U.P.) Kerala Himanchal Pradesh (H.P.) Gujrat Delhi Haryana |
67.7 63.8 69.7 93.9 83.8 79.3 86.3 76.6 |

**Observation and Conclusion:**

The state of Kerala is way ahead of other states in India in the matter of the literacy rates. The states having literacy level below 70% are Andhra Pradesh, Bihar and Uttar Pradesh. Whereas states like Gujarat, Haryana and Himachal Pradesh have shown an average performance. Delhi being the capital of India has literacy level of 86.3%,which requires attention and should be enhanced. Among all the states, Bihar has the lowest literacy level.

#### Page No 99:

#### Question 1:

Check your school records on admissions. See how many students were admitted every year during the last 10 years. Classify the data as male and female students. Present the data in the form of a multiple bar diagram.

#### Answer:

Year |
2003−04 |
2004−05 |
2005−06 |
2006−07 |
2007−08 |
2008−09 |
2009−10 |
2010−11 |
2011−12 |
2012−13 |

MaleStudents |
40 | 50 | 60 | 45 | 50 | 90 | 65 | 70 | 75 | 80 |

FemaleStudents |
50 | 30 | 70 | 50 | 50 | 50 | 45 | 80 | 80 | 90 |

#### Page No 103:

#### Question 1:

Here is an exercise for the students of Class XI. Draw a programme to conduct direct personal oral investigation of all the students of your school. Find out which mode of transport they use to come to the school. Present your information in terms of a pie diagram.

#### Answer:

Mode of Transportation |
Percentage Share |
Degree Share |

School Bus | 40 | $\frac{40}{100}\times 360\xb0=144\xb0$ |

Auto- rickshaw | 10 | $\frac{10}{100}\times 360\xb0=36\xb0$ |

Van | 25 | $\frac{25}{100}\times 360\xb0=90\xb0$ |

Personal Vehicle | 25 | $\frac{25}{100}\times 360\xb0=90\xb0$ |

#### Page No 109:

#### Question 1:

Make a suitable diagram of the following data on population in India:

Year | 1951 | 1961 | 1971 | 1981 | 1991 | 2001 | 2011 |

Population (crore) | 36.1 | 43.9 | 54.8 | 68.3 | 84.6 | 102.8 | 121.0 |

#### Answer:

Year |
1951 | 1961 | 1971 | 1981 | 1991 | 2001 |

Population (in crore) |
36.1 | 43.9 | 54.8 | 68.3 | 84.6 | 102.8 |

#### Page No 109:

#### Question 2:

Give a diagrammatic presentation of the following data on India's Exports and Imports:

Year | Export (₹ crore) |
Import (₹ crore) |

2014-15 2015-16 2016-17 |
18,96,445 17,16,378 18,52,340 |
27,37,087 24,90,298 25,77,422 |

#### Answer:

The given data can be presented in the form of a multiple bar diagram as follows.

#### Page No 110:

#### Question 3:

Make a bar diagram of the following data on India's population:

Year | 1971 | 1981 | 1991 | 2001 | 2011 |

Population (crore) | 54.8 | 68.3 | 84.6 | 102.8 | 121.0 |

#### Answer:

Year |
1971 | 1981 | 1991 | 2001 | 2011 |

Population(in crore) |
54.8 | 68.3 | 84.6 | 102.8 | 121 |

#### Page No 110:

#### Question 4:

Make a multiple bar diagram of the following data:

Faculty | Number of Students | ||

2014-15 | 2015-16 | 2016-17 | |

Arts Science Commerce |
600 400 200 |
550 500 250 |
500 600 300 |

#### Answer:

**Number of Students in Different Academic Streams**

#### Page No 110:

#### Question 5:

Following table shows estimates of cost of production of certain commodities. Present the data in the form of a sub-divided bar diagram:

Estimate of Cost | Goods | |||

A | B | C | D | |

Raw materia Wages Fixed Costs Office expenses |
50 40 10 10 |
40 40 12 8 |
45 40 15 10 |
50 40 15 5 |

Total Cost | 110 | 100 | 110 | 110 |

#### Answer:

Goods |
|||||

Estimates |
A |
B |
C |
D |
Total |

Raw Materials Wages Fixed Cost Office Expenses |
50 40 10 10 |
40 40 12 8 |
45 40 15 10 |
50 40 15 5 |
185 160 52 33 |

#### Page No 110:

#### Question 6:

Present the following data in the form of a multiple bar diagram:

Year | Exports (₹ crore) |
Imports (₹ crore) |

2013-14 2014-15 2015-16 2016-17 |
19,05,011 18,96,445 17,16,378 18,52,340 |
27,15,434 27,37,087 24,90,298 25,77,422 |

#### Answer:

Year |
Export(Rs crore) |
Import(Rs crore) |

2013-14 2014-15 2015-16 2016-17 |
19,05,011 18,96,445 17,16,378 18,52,340 |
27,15,434 27,37,087 24,90,298 25,77,422 |

#### Page No 110:

#### Question 7:

Waht do you mean by a circular diagram? Present the data on the expenditure of a labour-family in the form of a circular diagram:

Items of Expenditure | Food | Clothing | Housing | Fuel and Light | Others |

Percentage of Income Spent | 65 | 15 | 12 | 5 | 3 |

#### Answer:

Circular diagram or a Pie diagram depicts** **a circle that is divided into various segments showing the values of different items (components) in percentage terms

For presenting the given percentage values in a pie diagram, the percentage values must be converted into the respective degree values, for which the following formula is used.

$\mathrm{Degree}\mathrm{Value}=\frac{\mathrm{Component}\mathrm{Value}}{100}\times 360$

Item |
Percentage Share |
Degree Share |

Food | 65 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Food}=\frac{65}{100}\times 360=234\xb0$ |

Clothing | 15 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Clothing}=\frac{15}{100}\times 360=54\xb0$ |

Housing | 12 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Housing}=\frac{12}{100}\times 360=43.2\xb0$ |

Fuel & Light | 5 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Fuel}\mathrm{and}\mathrm{Light}=\frac{5}{100}\times 360=18\xb0$ |

Others | 3 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Others}=\frac{3}{100}\times 360=10.8\xb0$ |

#### Page No 110:

#### Question 8:

Following data relate to the construction of a house in Delhi. Present the information in the form of a pie diagram:

Items | Labour | Bricks | Cement | Steel | Timber | Supervision |

Percentage Expenditure | 25 | 15 | 20 | 15 | 10 | 15 |

#### Answer:

The percentage values are converted into degree values using the following formula.

$\mathrm{Degree}\mathrm{value}=\frac{\mathrm{Component}\mathrm{value}}{100}\times 360$

Items |
Percentage Share |
Degree Share |

Labour | 25 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\mathrm{Labour}=\frac{25}{100}\times 360=90\xb0$ |

Bricks | 15 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Bricks}=\frac{15}{100}\times 360=54\xb0$ |

Cement | 20 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Cement}=\frac{20}{100}\times 360=72\xb0$ |

Steel | 15 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Steel}=\frac{15}{100}\times 360=54\xb0$ |

Timber | 10 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Timber}=\frac{10}{100}\times 360=36\xb0$ |

Supervision | 15 | $\mathrm{Degree}\mathrm{share}\mathrm{of}\hspace{0.17em}\mathrm{Supervision}=\frac{15}{100}\times 360=54\xb0$ |

#### Page No 111:

#### Question 9:

For the years 2012-13 and 2013-14, value of gross domestic product at factor cost by the industry of origin is given in the following table. Present the information in the form of Pie Diagram showing differences in the percentage contribution of different sectors between the said years.

Sector | Year | |

2012-13 | 2013-14 | |

Primary Secondary Tertiary |
17 57 26 |
16.7 26 57.3 |

Total | 100 | 100 |

#### Answer:

The percentage values are converted into degree values using the following formula.

$\mathrm{Degree}\mathrm{share}=\frac{\mathrm{Percentage}\mathrm{share}}{100}\times 360\phantom{\rule{0ex}{0ex}}=\mathrm{Percentage}\mathrm{share}\times 3.6$

Year 2012 - 2013 |
Year 2013 - 2014 |
||||

Sector |
Percentage contribution |
Degree Share |
Sector |
Percentage contribution |
Degree Share |

Primary |
17 | $17\times 3.6=61.2\xb0$ | Primary |
16.7 | $16.7\times 3.6=60.12\xb0$ |

Secondary |
57 | $57\times 3.6=205.2\xb0$ | Secondary |
26 | $26\times 3.6=93.6\xb0$ |

Tertiary |
26 | $26\times 3.6=93.6\xb0$ | Tertiary |
57.3 | $57.3\times 3.6=206.28\xb0$ |

Analysing the above diagram, we can conclude that in 2012-13 it is the secondary sector that contributed the most to GDP, on the other hand, in 2013-14, it is tertiary sector that contributed the most to GDP.

#### Page No 111:

#### Question 10:

Present the following data on the production of food grains in the form of a sub-divided bar diagram:

Year | Wheart | Rice | Gram | Total |

2016 2017 |
30 45 |
20 30 |
10 15 |
60 90 |

#### Answer:

Year |
Wheat |
Rice |
Grain |
Total |

2016 |
30 | 20 | 10 | 60 |

2017 |
45 | 30 | 15 | 90 |

#### Page No 111:

#### Question 11:

Present the following data by a deviation bar diagram, showing the difference between sale proceeds and costs of a firm.

Year | Sale Proceeds (₹ in lakh) |
Costs (₹ in lakh) |

2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 |
115 140 145 150 160 170 |
100 115 155 140 145 165 |

#### Answer:

Year |
Sale Proceeds |
Costs |
Sale Proceeds − Costs |

2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 |
115 140 145 150 160 170 |
100 115 155 140 145 165 |
15 25 −10 10 15 5 |

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