- Statistics
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- Presentation of Data
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- Bar Graph
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- Histogram
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- Measures of Central Tendency
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- How to Solve Mean,Median and Mode problem's
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- Solved exmaples

In this page we have *NCERT Solutions Class 9th Maths Statistics* for
EXERCISE 3 . Hope you like them and do not forget to like , social share
and comment at the end of the page.

2, 3, 4, 5, 0, 1, 3, 3, 4, 3

Find the mean, median and mode of these scores.

=(2+3+4+5+0+1+3+3+4+3)/10 =2.8

We need to arrange the goals in increasing order

0,1,2,3,3,3,3,4,4,5

Since the number of terms is 10 (even)

We need to arrange the goals in increasing order

0,1,2,3,3,3,3,4,4,5

Since 3 occurs becomes maximum times. It is the mode

In a mathematics test given to 15 students, the following marks (out of 100) are recorded:

41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60

Find the mean, median and mode of this data.

=(41+39+48+52+46+62+54+40+96+52+98+40+42+52+60)/10 =54.8

We need to arrange the data in increasing order

39,40,40,41,42,46,48,52,52,52,54,60,62,96,98

Since the number of terms is 15(odd)

edian= (n+1)/2=8 term=52

52 occurs maximum times.So mode is 52

The following observations have been arranged in ascending order. If the median of the data is 63, find the value of

29, 32, 48, 50,

2x+2=126

x=62

Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.

14 occurs maximum time,so mode is 14

Find the mean salary of 60 workers of a factory from the following table

Salary( in Rs) |
Number of Workers |

3000 |
16 |

4000 |
12 |

5000 |
10 |

6000 |
8 |

7000 |
6 |

8000 |
4 |

9000 |
3 |

10000 |
1 |

Total |
60 |

x |
f |
fx |

3000 |
16 |
48000 |

4000 |
12 |
48000 |

5000 |
10 |
50000 |

6000 |
8 |
48000 |

7000 |
6 |
42000 |

8000 |
4 |
32000 |

9000 |
3 |
27000 |

10000 |
1 |
10000 |

sum |
60 |
305000 |

Download this assignment as pdf

Given below are the links of some of the reference books for class 9 Math.

- Mathematics for Class 9 by R D Sharma One of the best book for studying class 9 level mathematics. It has lot of problems to be solved.
- Secondary School Mathematics for Class 9 by R S Aggarwal This is also as good as R.D. Sharma. Either this or the book by R.D. Sharma will do. I find book R.S. Aggarwal little bit more challenging than the one by R.D. Sharma.
- Pearson IIT Foundation Series - Maths - Class 9 Buy this book if you want to challenge yourself further and want to prepare for JEE foundation.
- Pearson IIT Foundation Physics, Chemistry & Maths combo for Class 9 Only buy if you are prepared to study extra topics and want to take your studies a step further. You might need help to understand topics in these books.

You can use above books for extra knowledge and practicing different questions.

Class 9 Maths Class 9 Science

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