**ML Aggarwal CBSE Solutions Class 7 Math 16th Chapter Data Handling Exercise 16.2**

**(1) Find the mean of the following data:**

**(i) 40, 30, 30, 0, 26, 60**

**(ii) 3, 5, 7, 9, 11, 13, 15**

**(2) Find the mean of the first five whole numbers.**

**(3) A batsman scored the following number of runs in six innings:**

**36, 35, 50, 46, 60, 55**

**Calculate the mean runs scored by him in an inning.**

**Solution: **

**(4) The enrollment in a school during six consecutive years was as follows:**

**1555, 1670, 1750, 2013, 2540, 2825**

**Find the mean enrollment of the school for this period:**

**(5) 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, 75**

**Find the:**

**(i) highest and lowest obtained by the students**

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

**(iii) mean marks obtained by the students.**

**(6) The highest 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 height of the tallest girl?**

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

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

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

**Solution: **

**(7) If the arithmetic mean of 8, 4, 6, x, 2, 7 is 5, then find the value of x.**

**(8) Find the mean of the following data:**

Marks obtained |
2 |
3 |
4 |
7 |
10 |

Number of students |
3 |
2 |
6 |
7 |
2 |

**Solution: **