# NCERT Solutions For Class 6 Maths Chapter 9 Data Handling Exercise 9.4

### Download The PDF File Of NCERT Solutions for Class 6 Maths Chapter 9: Data Handling Exercise 9.4

### Access NCERT Solutions for Class 6 Maths Chapter 9: Data Handling Exercise 9.4

**1. A survey of 120 school students was done to find which activity they prefer to do in their free time.**

Preferred activity | Number of Students |

Playing | 45 |

Reading story books | 30 |

Watching T.V | 20 |

Listening to music | 10 |

Painting | 15 |

**Draw a bar graph to illustrate the above data taking scale of 1 unit length = 5 students. Which activity is preferred by most of the students other than playing?**

**Solutions:**

By taking a scale of 1 unit length = 5 students, bar graph is shown below considering the above data

Reading story books is the activity preferred by most of the students other than playing

**2. The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below:**

Days | Sunday | Monday | Tuesday | Wednesday | Thursday | Friday |

Number of books sold | 65 | 40 | 30 | 50 | 20 | 70 |

**Draw a bar graph to represent the above information choosing the scale of your choice.**

**Solutions:**

By taking a scale of 1 unit length = 10 books we may draw a bar graph of above data as follows

**3. Following table shows the number of bicycles manufactured in a factory during the years 1998 to 2002. Illustrate this data using a bar graph. Choose a scale of your choice**

Year | Number of bicycles manufactured |

1998 | 800 |

1999 | 600 |

2000 | 900 |

2001 | 1100 |

2002 | 1200 |

**(a) In which year were the maximum number of bicycles manufactured?**

**(b) In which year were the minimum number of bicycles manufactured?**

**Solutions:**

By taking a scale of 1 unit length = 100 bicycles we may draw a bar graph of above data as follows

**(a) **In the year 2002, maximum number of bicycles were manufactured i.e 1200 bicycles

(b) In the year 1999, minimum number of bicycles were manufactured i.e 600 bicycles

**4. Number of persons in various age groups in a town is given in the following table.**

Age group
| 1-14 | 15-29 | 30-44 | 45-59 | 60-74 | 75 and above |

Number of persons | 2 lakhs | 1 lakh 60 thousands | 1 lakh 20 thousands | 1 lakh 20 thousands | 80 thousands | 40 thousands |

**Draw a bar graph to represent the above information and answer the following questions. (take 1 unit length = 20 thousands)**

**(a) Which two age groups have same population?**

**(b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?**

**Solutions:**

By taking a scale of 1 unit length = 20 thousands we may draw a bar graph of above data as follows

(a) The two age groups which have same population are 30-44 and 45-59

(b) Senior citizens are the persons between the age group either from 60-74 or from 75 above. Therefore

Number of senior citizens in the town = 80000 + 40000

= 1 lakh 20 thousand

Hence, the number of senior citizens in the town are 1 lakh 20 thousand