**ML Aggarwal CBSE Solutions Class 7 Math 13th Chapter Data Handling Exercise 16.1**

**(1) The number of rooms in 25 houses of a locality is as given below:**

**4,3,2,6,4,3,2,1,5,3,2,3,4,3,5,1,6,1,3,4,2,3,4,3,5**

**(i) Arrange the above data in ascending order.**

**(ii) Find the range of the data.**

**(iii) Construct frequency distribution table for the above data.**

**(iv) Find the number of houses which have 4 or more than 4 rooms.**

**(v) Draw bar graph to represent the above data.**

**Solution: **

**(2) The adjoining bar graph shows the number of books sold by a bookstore during five consecutive years. Read the bar graph and answer the following questions:**

**(i) About how many books were sold in 2008, 2009 and 2011 years?**

**(ii) In which years about 475 books and 225 books sold?**

**(3) Two hundred students of 6th and 7th class were asked to name their favorite colour so as to decide upon what should be the colour of their school buiding . The results are shown in the following table:**

Favorite colour |
red |
green |
blue |
yellow |
orange |

Number of students |
43 |
19 |
55 |
49 |
34 |

**Represents the given data on a bar graph.**

**Answer the following questions with the help of bar graph:**

**(i) Which is the most preferred colour?**

**(ii) Which is the least preferred colour?**

**(iii) How many colours are there in all? What are they?**

**(4) (4) Sale of English and Hindi books in four consecutive years is given below:**

Years |
2008 |
2009 |
2010 |
2011 |

English |
350 |
400 |
450 |
620 |

Hindi |
500 |
525 |
600 |
650 |

**Draw a double bar graph to represent the above data and answer the following questions:**

**(i) In which year was the difference in the sale of two language books least?**

**(ii) Can you say that the demand for English books rose faster? Justify your answer.**

**(5) Consider the following data collected from a survey of a colony:**

Favorite sport |
cricket |
basketball |
swimming |
hocky |
atheletics |

Watching |
1240 |
470 |
510 |
430 |
250 |

participating |
620 |
320 |
320 |
250 |
110 |

**Draw a double bar graph choosing an appropriate scale.**

**Answer the following questions using the bar graph:**

**(i) Which sports is most popular?**

**(ii) Which is more preferred, watching or participating in sports?**

**Solution: **

Thanks sir