# NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 13 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Exercise 14.4**

Q. 1. The following are the marks (out of 100) of 60 students in mathematics.

Construct a grouped frequency distribution table with width of each class starting from .

Answer:

Class | ||||||||||

Frequency | 1 | 2 | 5 | 6 | 3 | 4 | 3 | 2 | 5 | 4 |

Q. 2. Refer to Q1 above. Construct a grouped frequency distribution table with width 10 of each class, in such a way that one of the classes is 10 - 20 (20 not included) .

Answer:

Class intervals | Frequency |

4 | |

7 | |

5 | |

10 | |

5 | |

8 | |

5 | |

8 | |

5 | |

3 |

Q. 3. Draw a histogram of the following distribution:

Heights (in cm) | Number of students |

7 | |

8 | |

14 | |

10 | |

6 | |

5 |

Q. 4. Draw a histogram to represent the following grouped frequency distribution:

Ages (in years) | Number of teachers |

10 | |

28 | |

32 | |

48 | |

50 | |

35 | |

12 |