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

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Q. 5. Convert the given frequency distribution into a continuous grouped frequency distribution:

Class interval | Frequency |

In which intervals would and be included?

Answer:

Class intervals | Frequency |

153.5 is included in the class interval and in .

Q. 6. The expenditure of a family on different heads in a month is given below:

Head | Food | Education | Clothing | House Rent | Others | Savings |

Expenditure (in ₹) |

Draw a bar graph to represent the data above.

Q. 7. Expenditure on Education of a country during a five year period in crores of rupees is given below:

Elementary education | |

Secondary Education | |

University Education | |

Teacher՚s Training | |

Social Education | |

Other Educational Programmes | |

Cultural programmes | |

Technical Education |

Represent the information above by a bar graph.

Q. 8. The following table gives the frequencies of most commonly used letters a , e, i, o , r , t, u from a page of a book:

Letters | a | e | i | o | r | t | u |

Frequency | 75 | 125 | 80 | 70 | 80 | 95 | 75 |

Represent the information above by a bar graph.

Q. 9. If the mean of the following data is 20.2, find the value of p:

X | 10 | 15 | 20 | 25 | 30 |

f | 6 | 8 | p | 10 | 6 |

Answer: 20