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ConceptMedian of Grouped Data

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#### Question

For a certain frequency distribution, the value of mean is 20 and mode is 11. Find the value of median.

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The following table shows ages of 3000 patients getting medical treatment in a hospital on a particular day :

Age (in years) | No. of Patients |

10-20 | 60 |

20-30 | 42 |

30-40 | 55 |

40-50 | 70 |

50-60 | 53 |

60-70 | 20 |

Find the median age of the patients.

Below is the given frequency distribution of words in an essay

Number of Words | Number of Candidates |

600 – 800 | 8 |

800 – 1000 | 22 |

1000 – 1200 | 40 |

1200 – 1400 | 18 |

1400 - 1600 | 12 |

Find the mean number of words written.