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Section A | Section B | ||

Marks | Frequency | Marks | Frequency |

0 - 10 | 3 | 0 - 10 | 5 |

10 - 20 | 9 | 10 - 20 | 19 |

20 - 30 | 17 | 20 - 30 | 15 |

30 - 40 | 12 | 30 - 40 | 10 |

40 - 50 | 9 | 40 - 50 | 1 |

From the two polygons compare the performance of the two sections.

Answer :

We can find the class marks Of the given class intervals by using the following formula.

\(Class mark = \frac{Upper Class Limit + Lower Class Limit}{2}\)

Section A | Section B | ||||

Marks | Class Marks | Frequency | Marks | Class Marks | Frequency |

0 - 10 | 5 | 3 | 0 - 10 | 5 | 5 |

10 - 20 | 15 | 9 | 10 - 20 | 15 | 19 |

20 - 30 | 25 | 17 | 20 - 30 | 25 | 15 |

30 - 40 | 35 | 12 | 30 - 40 | 35 | 10 |

40 - 50 | 45 | 9 | 40 - 50 | 45 | 1 |

Taking class marks on x-axis and frequency on y-axis and choosing an appropriate scale (1 unit - 3 for y-axis), the frequency polygon can be drawn as follows.

It can be observed that the performance Of students Of section 'A' is better than the students of section 'B' in terms of good marks.

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- NCERT solutions for class 9 maths chapter 1 Number Systems
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- NCERT solutions for class 9 maths chapter 3 Coordinate geometry
- NCERT solutions for class 9 maths chapter 4 Linear equations in two variables
- NCERT solutions for class 9 maths chapter 5 Introduction to Euclidean Geometry
- NCERT solutions for class 9 maths chapter 6 Lines and Angles
- NCERT solutions for class 9 maths chapter 7 Triangles
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- NCERT solutions for class 9 maths chapter 10 Circles
- NCERT solutions for class 9 maths chapter 11 Constructions
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- NCERT solutions for class 9 maths chapter 13 Surface areas and volumes
- NCERT solutions for class 9 maths chapter 14 Statistics
- NCERT solutions for class 9 maths chapter 15 Probability

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- NCERT solutions for class 9 science chapter 2 Is Matter Around Us Pure
- NCERT solutions for class 9 science chapter 3 Atoms and Molecules
- NCERT solutions for class 9 science chapter 4 Structure of the Atom
- NCERT solutions for class 9 science chapter 5 The Fundamental Unit of Life
- NCERT solutions for class 9 science chapter 6 Tissues and Fundamental unit of life
- NCERT solutions for class 9 science chapter 7 Diversity in Living Organisms
- NCERT solutions for class 9 science chapter 8 Motion
- NCERT solutions for class 9 science chapter 9 Force and Laws of Motion
- NCERT solutions for class 9 science chapter 10 Gravitation
- NCERT solutions for class 9 science chapter 11 Work and Energy
- NCERT solutions for class 9 science chapter 12 sound
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- NCERT solutions for class 9 science chapter 14 Natural Resources
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