Home
Class 12
MATHS
A group of 10 items has mean 6. If the m...

A group of 10 items has mean 6. If the mean of 4 of these items is 7.5, then the mean of the remaining items is

A

6.5

B

5.5

C

4.5

D

`5.0`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • MEASURES OF DISPERSION (STATISTICS)

    AAKASH SERIES|Exercise Exercise - II|32 Videos

  • MEAN VALUE THEOREMS

    AAKASH SERIES|Exercise EXERCISE|28 Videos

  • PARABOLA

    AAKASH SERIES|Exercise EXERCISE -3.2 III.|5 Videos

Similar Questions

Explore conceptually related problems

Sum of 20 items is 100 then the mean is___

If the mean of the following data is 7.5, then find the value of 'A'.

If the mean of the following data is 7.5 , then find the value of ‘A’ .

The mean of first three items is 14 and mean of next two items is 18. The mean of all the five terms is :

Mean of eight observations is 25. If one observation 11 is excluded, the mean of the remaining.

what is mean.Clculate mean of 1 to10 numbers

The sum of 10 items is 12 and sum of their squares is 18, then standard deviaiton is

Mean of 100 items is 50 and their S.D. is 4. Find the sum of all the items and also the sum of the squares of the items.

AAKASH SERIES-MEASURES OF DISPERSION (STATISTICS)-Practice Exercise
  1. Mean of 100 observation is 45. It was later found that two observation...

    Text Solution

    |

  2. Mean of 10 numbers is 6. It was later observed that one number was mis...

    Text Solution

    |

  3. A group of 10 items has mean 6. If the mean of 4 of these items is 7.5...

    Text Solution

    |

  4. The mean weight of 150 students in a certain class is 60 kilograms. Th...

    Text Solution

    |

  5. The mean age of a combined group of men and women is 30 years. If the ...

    Text Solution

    |

  6. The mean of a set observations is bar(x). If each observation if divid...

    Text Solution

    |

  7. If the mean of a set of observations x(1), x(2),….,x(10) is 20 then th...

    Text Solution

    |

  8. The A.M. of the series .^(n)C(0), .^(n)C(1), .^(n)C(2),….,.^(n)C(n) ...

    Text Solution

    |

  9. The mean of first three items is 14 and mean of next two items is 18. ...

    Text Solution

    |

  10. Six faces of a balanced die are numbered from integers 1 to 6. This di...

    Text Solution

    |

  11. The A.M. of set of 50 numbers is 38. If two numbers of the set, namely...

    Text Solution

    |

  12. The simple and weighted arithmetic mean of the first n natural numbers...

    Text Solution

    |

  13. The average salary of male employees in a firm was RS. 520 and that of...

    Text Solution

    |

  14. The median of 25, 14, 11, 26, 18 , 17, 40, 29, 19, 20, 13 is

    Text Solution

    |

  15. The median of 111, 129, 143, 118, 120, 125, 170, 162 is

    Text Solution

    |

  16. The median of the following items 25,15,23,40,27,25,23,25 and 20 is

    Text Solution

    |

  17. The test marks in statistic for a class are 20,24,27,38,18,42,35,21,44...

    Text Solution

    |

  18. The mean of two samples of sizes 200 and 300 were found to be 25, 10 r...

    Text Solution

    |

  19. The median of a series is 10. Two additional observations 7 and 20 are...

    Text Solution

    |

  20. The mean and standard deviation of 20 items is found to be 10 and 2 re...

    Text Solution

    |