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ToggleThis article provides **NCERT Solutions for Class 7 Maths Exercise 3.1 Chapter 3 Data Handling** in a simple PDF format. This exercise helps students to understand how to collect and organize data and how to calculate the average value. Mean is the most common representative value of a group of data.

It is essential for Class 7 students to solve this exercise to strengthen their understanding of these concepts. Solving NCERT Solutions for Class 7 Chapter 3 will also help them to answer questions asked in exams. So, download the PDF and enhance your understanding of data handling concepts.

## Class 7, Maths, Chapter 3, Exercise 3.1 Solutions

**Q.1. Find the range of heights of any ten students of your class.**

**Q.2. Organise the following marks in a class assessment, in a tabular form.**

**4, 6, 7, 5, 3, 5, 4, 5, 2, 6, 2, 5, 1, 9, 6, 5, 8, 4, 6, 7**

**(i) Which number is the highest? **

**(ii) Which number is the lowest?**

**(iii) What is the range of the data? **

**(iv) Find the arithmetic mean.**

**Q.3. Find the mean of the first five whole numbers.**

**Q.4. A cricketer scores the following runs in eight innings: 58, 76, 40, 35, 46, 45, 0, 100. **

**Find the mean score.**

**Q.5. Following table shows the points of each player scored in four games:**

**Now answer the following questions:**

**(i) Find the mean to determine A’s average number of points scored per game.**

**(ii) To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why?**

**(iii) B played in all the four games. How would you find the mean?**

**(iv) Who is the best performer?**

**Q.6. The marks (out of 100) obtained by a group of students in a science test are 85, 76,90, 85, 39, 48, 56, 95, 81 and 75. Find the:**

**(i) Highest and the lowest marks obtained by the students.**

**(ii) Range of the marks obtained.**

**(iii) Mean marks obtained by the group.**

**Q.7. The enrolment in a school during six consecutive years was as follows: 1555, 1670, 1750, 2013, 2540, 2820**

**Find the mean enrolment of the school for this period.**

**Q.8. The rainfall (in mm) in a city on 7 days of a certain week was recorded as follows:**

**(i) Find the range of the rainfall in the above data.**

**(ii) Find the mean rainfall for the week.**

**(iii) On how many days was the rainfall less than the mean rainfall.**

**Q.9. The heights of 10 girls were measured in cm and the results are as follows: 135, 150, 139, 128, 151, 132, 146, 149, 143, 141.**

**(i) What is the height of the tallest girl? **

**(ii) What is the height of the shortest girl?**

**(iii) What is the range of the data? **

**(iv) What is the mean height of the girls?**

**(v) How many girls have heights more than the mean height**