Home
Class 9
MATHS
The mean of 31 results is 60. if the mea...

The mean of 31 results is 60. if the mean of first 16 results is 58 and that of the last 16 results is 62, find the 16th results.

Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    MODERN PUBLICATION|Exercise EXERCISE|239 Videos
  • QUADRILATERALS

    MODERN PUBLICATION|Exercise EXERCISE|133 Videos
  • SURFACE AREAS AND VOLUMES

    MODERN PUBLICATION|Exercise EXERCISE|228 Videos

Similar Questions

Explore conceptually related problems

The mean of 25 observations is 36. Out of these observationsif the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is :

The mean of 25 observations is 36. Out of these observationsif the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is :

The mean of first 8 observations is 18 and last 8 observations is 20. if the mean of all 15 observations is 19, find the 8th observations.

The sum of four numbers in G.P. is 60 and the arithmetic mean of the first and the last is 18. Find the numbers.

The mean of 100 observations is 50. If one of the observations which was 50 is replaced by 150, the resulting mean will be :

Find the 51st term of an AP whose 11th term is 38 and the 16th term is 73.

MODERN PUBLICATION-STATISTICS-EXERCISE
  1. A cricketar has a mean score of 58 runs in nine innings. Find out how ...

    Text Solution

    |

  2. The average monthly salary of 20 workers in an office is Rs 7650. If t...

    Text Solution

    |

  3. The mean of 31 results is 60. if the mean of first 16 results is 58 an...

    Text Solution

    |

  4. There are 50 students in a class, of which 40 are boys. The average we...

    Text Solution

    |

  5. Find the mean of the following data

    Text Solution

    |

  6. find the mean of daily wages of 60 workers in a factory as per data gi...

    Text Solution

    |

  7. Find the mean of the following frequency distribution

    Text Solution

    |

  8. If the mean of the following frequency distribution is 8, find the val...

    Text Solution

    |

  9. find the missing freuency p for the following frequency distribution w...

    Text Solution

    |

  10. If the mean of the following data is 15, find p

    Text Solution

    |

  11. find the value of p for the following distribution whose mean is 16.6

    Text Solution

    |

  12. Find the value of p if the mean of the following distributions is 20

    Text Solution

    |

  13. Find the median of the following data: 12,11,6,7,10,17,9,15,13

    Text Solution

    |

  14. Find the median of the following data: 15,6,16,8,22,21,9,18,25

    Text Solution

    |

  15. Find the median of the following data: 7,4,2,5,1,4,0,10,3,8,5,9,2

    Text Solution

    |

  16. Find the median of the following data: 31,38,27,28,36,25,35,40

    Text Solution

    |

  17. Find the median of the following data: 72,63,29,51,25,60,55,91,85,82

    Text Solution

    |

  18. Find the median of the following data: 12,11,6,7,10,17,9,15,13

    Text Solution

    |

  19. Construct a grouped frequency table with class intervals 0-5, 5 -10 an...

    Text Solution

    |

  20. The weight of 8 children are 13.4, 10.6, 12.7, 17.2, 14.3, 15, 16.5, 9...

    Text Solution

    |