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# The data given below shows the production of motor bikes in a factory for some months of two consecutive years.

Study the table given above and answer the following questions:

(a) Draw a double bar graph using appropriate scale to depict the above information and compare them.

(b) In which year was the total output the maximum?

(c) Find the mean production for the year 2007.

(d) For which month was the difference between the production for the two years the maximum? (e) In which month for the year 2008, the production was the maximum?

(f) In which month for the year 2007, the production was the least?

**Solution:**

Given, the table shows the production of motor bikes in a factory for some months of two consecutive years.

(a) We have to draw a __bar graph__ for given __data__ by choosing appropriate scale.

(b) We have to find the year in which the total output was the maximum.

Total output in 2007 = 2800 + 4500 + 4800 + 4800 + 5200 = 22100

Total output in 2008 = 2700 + 3200 + 6000 + 5000 + 4200 = 21100

The total output was maximum in the year 2007.

(c) We have to find the __mean__ production for the year 2007.

We know, mean = sum of observations/number of observations

Sum of observations = 2800 + 4500 + 4800 + 4800 + 5200 = 22100

Number of observations = 5

Mean = 22100/5 = 4420

(d) We have to find the month for which the difference between the production for the two years was the maximum.

Difference between the production for February = 2800 – 2700 = 100

Difference between the production for May = 4500 – 3200 = 1300

Difference between the production for August = 6000 – 4800 = 1200

Difference between the production for October = 5000 – 4800 = 200

Difference between the production for December = 5200 – 4200 = 1000

Therefore, the difference between the production for the two years was maximum in the month of May.

(e) We have to find in which month for the year 2008, the production was the maximum.

From the graph,

The production was maximum in the month of August.

(f) We have to find in which month for the year 2007, the production was the least.

From the graph,

The production was least in the month of February.

**✦ Try This: **The data given below shows the production of motor bikes in a factory for some months of two consecutive years.

Months | January | February | March | April | May |

2009 | 3000 | 4000 | 3400 | 3300 | 5600 |

2008 | 4500 | 3500 | 4600 | 3200 | 5400 |

Study the table given above and answer the following questions: (a) Draw a double bar graph using appropriate scale to depict the above information and compare them

**☛ Also Check: **NCERT Solutions for Class 7 Maths Chapter 3

**NCERT Exemplar Class 7 Maths Chapter 3 Problem 88**

## The data given below shows the production of motor bikes in a factory for some months of two consecutive years. Study the table given above and answer the following questions: (a) Draw a double bar graph using appropriate scale to depict the above information and compare them. (b) In which year was the total output the maximum? (c) Find the mean production for the year 2007. (d) For which month was the difference between the production for the two years the maximum? (e) In which month for the year 2008, the production was the maximum? (f) In which month for the year 2007, the production was the least

**Summary:**

(a) A double bar graph using appropriate scale to depict the above information is mentioned above, (b) In 2007, the total output was maximum, (c) The mean production for the year 2007 is 4420, (d) The difference between the production for the two years was maximum in the month of May, (e) In the month of August for the year 2008, the production was the maximum, (f) In the month of February for the year 2007, the production was the least

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