Listen NCERT Audio Books to boost your productivity and retention power by 2X.

3

The marks scored by 55 students in a test given below:

Marks: | 0-5 | 5-10 | 10-15 | 15-20 | 20-25 | 25-30 | 30-35 |

No. of students | 2 | 6 | 13 | 17 | 11 | 4 | 2 |

Prepare a cumulative frequency table.

4

Following are the ages of 360 patients getting medical treatment in a hospital on a day:

Age (in years) | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 |

No. of patients : | 90 | 50 | 60 | 80 | 50 | 30 |

Construct a cumulative frequency distribution.

7

Given below are the cumulative frequencies showing the weights of 685 students of a school. Prepare a frequency distribution table.

Weights (in kg) | No. of students |

Below 25 Below 30 Below 35 Below 40 Below 45 Below 50 Below 55 Below 60 Below 65 Below 70 | 0 24 78 183 294 408 543 621 674 685 |

8

The following cumulative frequency distribution table shows the daily electricity consumption (in KV) of 40 factories in an industrial state:

Consumption (in KV) | No. of Factories |

Below 240 Below 270 Below 300 Below 330 Below 360 Below 390 Below 420 | 1 4 8 24 33 38 40 |

(i) Represent this as a frequency distribution table.

(ii) Prepare a cumulative frequency table.

9

Given below is a cumulative frequency distribution table showing the ages of people living in a locality:

Age in years | No. of persons |

Above 108 Above 96 Above 84 Above 72 Above 60 Above 48 Above 36 Above 24 Above 12 Above 0 | 0 1 3 5 20 158 427 809 1026 1124 |

Prepare a frequency distribution table.