# RD Sharma Class 10 Chapter 7 (Statistics) Solutions

ShareIn **Chapter-7 of RD Sharma Class 10 textbook**, you will first come across questions in which you have to obtain the mean of the given data. In case the value of mean is given, you can obtain the missing frequency using the relevant formula.

The first three exercises of Chapter-7 include questions asking you to find the average of the given information. The next two exercises consist of questions in which you need to calculate the median, missing frequencies, and mode. In the last exercise, you will deal with questions telling you to draw an ‘ogive’ based on the frequency distribution.

## RD Sharma Class 10 Chapter 7 (Statistics) Solutions

Chapter 1 - Real Numbers |

Chapter 2 - Polynomials |

Chapter 3 - Pair of Linear Equations in Two Variables |

Chapter 4 - Triangles |

Chapter 5 - Trigonometric Ratios |

Chapter 6 - Trigonometric Identities |

Chapter 7 - Statistics |

Chapter 8 - Quadratic Equations |

Chapter 9 - Arithmetic Progressions |

Chapter 10 - Circles |

Chapter 11 - Constructions |

Chapter 12 - Some Application of Trigonometry |

Chapter 13 - Probability |

Chapter 14 - Co-ordinate Geometry |

Chapter 15 - Areas Related to Circles |

Chapter 16 - Surface Areas and Volumes |

**Statistics Formulas Class 10 **

** **In class 10, you will study the following formulas of statistics.

- Mean can be obtained by three different ways:
- the direct method: x = ∑f
_{i}x_{i}/ ∑f_{i} - the assumed mean method: x = a + (∑f
_{i}d_{i}/ ∑f_{i}) - the step deviation method: x = a + (∑f
_{i}u_{i}/ ∑f_{i}) x h - Median of grouped data can be obtained by the following formula:
- Median = l + {(n/2 - cf)/(f)} x h
- To obtain the mode for grouped data, use the following formula:
- Mode = l + {(f
_{1}- f_{0})/ (2f_{1}- f_{0}- f_{2})} x h

**Concepts in RD Sharma Class 10 Chapter-7 **

For a better representation of data, you first convert raw data into an organized form and then apply the formula in accordance with the condition. As mentioned above, there are three major formulas in Chapter-7 RD Sharma Class 10.

For finding the mean via a direct method, you must be provided with the frequency and class mark. When finding the average through the assumed mean method, you must know the values of the sum of frequency, classmark, and deviation. Step-deviation method is applicable when all the deviations have a common factor.

In this chapter, you will get to solve questions from the following topics.

- Introduction
- Mean of Grouped Data
- Mode of Grouped Data
- Median of Grouped Data
- Graphical Representation of Cumulative Frequency Distribution