Home
Class 8
MATHS
The sum of deviations of ‘n’ observa tio...

The sum of deviations of ‘n’ observa tions from 25 is 25 and sum of devia tions of the same’n’ observations from 35 is-25. Find the mean of the observations.

Promotional Banner

Topper's Solved these Questions

  • FREQUENCY DISTRIBUTION TABLES AND GRAPHS

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|133 Videos

  • FACTORISTION

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|182 Videos

  • LINEAR EQUATIONS IN ONE VARIABLE

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|223 Videos

Similar Questions

Explore conceptually related problems

Find the mean deviation from the median of the observations 1, 2, 3, 4 ?

If the mean of 10 observations is 50 and the sum of the squares of the deviations of the observations from the mean is 250 , such the coefficient of variation of those observations is

If the mean of 10 observations is 50 and the sum of the squares of the deviations of the observations from the mean is 250, then the coefficient of variation of those observations is

Find the sum of deviations of all observations of the data 10,12,15,3 from their mean.

Find the mean deviation from the mean of observations -1, 0, 4 ?

If sum of the 20 deviations from the ‘mean is 100, then find the mean deviation.

Find the sum of deviations of all ob servations of the data 5, 8, 10, 15, 22 from their mean.

VGS PUBLICATION-BRILLIANT-FREQUENCY DISTRIBUTION TABLES AND GRAPHS-EXERCISE
  1. Marks of 12 students in a unit test are given as 4, 21, 13, 17, 5, 9, ...

    Text Solution

    |

  2. Arithmetic mean of marks (out of 25) scored by 10 students was 15. One...

    Text Solution

    |

  3. The sum of deviations of ‘n’ observa tions from 25 is 25 and sum of de...

    Text Solution

    |

  4. Find the median of the data:3.3, 3.5, 3.1, 3.7, 3.2, 3.8

    Text Solution

    |

  5. Find the Median for the following data 30, 17, 12, 21, 33, 22 Ascendi...

    Text Solution

    |

  6. Find the mode of 10, 12, 11, 10, 15,20, 19, 21, 11, 9, 10.

    Text Solution

    |

  7. Mode of certain scores is x. If each score is decreased by 3, then fin...

    Text Solution

    |

  8. Find the mode of all digits used in writing the natural numbers from 1...

    Text Solution

    |

  9. Observations of a raw data are 5,28,15, 10, 15, 8, 24. Add, four more ...

    Text Solution

    |

  10. If the mean of a set of observationsx1, x2 x10 is 20. Find the mean of...

    Text Solution

    |

  11. The median of the data x/5, x, x/4, x/2 and x/8 is 8. Find the value o...

    Text Solution

    |

  12. The median of a set of 9 distinct observations is 20.5. If each of the...

    Text Solution

    |

  13. Make a frequency distribution of the following series. 1, 2, 2, 3, 3, ...

    Text Solution

    |

  14. Construct a frequency distribution for the following series of numbers...

    Text Solution

    |

  15. Write the mark wise frequencies in the following frequency distributio...

    Text Solution

    |

  16. The following marks achieved by 30 candidates in mathematics of SSC ex...

    Text Solution

    |

  17. Cumulative frequency curves are called as ......... curves.

    Text Solution

    |

  18. Greater than cumulative frequency is related to

    Text Solution

    |

  19. What is total frequency and less than cumulative frequency of e last c...

    Text Solution

    |

  20. Class intervals in a grouped frequency distribution are given as 4-11,...

    Text Solution

    |