Home
Class 12
MATHS
The mean of five numbers is 0 and their ...

The mean of five numbers is 0 and their variance is 2. If three of those numbers are - 1,1 and 2 , then the other two numbers are

A

`-5 and 3`

B

`-4 and 2`

C

`-3 and -1`

D

`-2 and 0`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    NEW JOYTHI PUBLICATION|Exercise EXSERCISE|34 Videos
  • SETS

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|21 Videos
  • STRAIGHT LINES

    NEW JOYTHI PUBLICATION|Exercise QUESTIONS FROM COMPETITIVE EXAMS|122 Videos

Similar Questions

Explore conceptually related problems

The mean of five observations is 4 and their variance is 5.2. If three of these observations are 1,2 and 6, then the other two are

The mean of 5 observations is 4 and their variancé is 52 . If three of them are 1,2,6 then the sum of other two

The mean of five observations is 5 and their variance is 9.20. If three of the given five observations are 1,3 and 8, then a ratio of other two observations is

The mean of set of seven numbers is 81. If one of the numbers is discarded, the mean of the remaining numbers is 78. The value of the discarded number is

There are four unknown numbers. The mean of the first two numbers is 4 and the mean of the first three is 9. The mean of all four number is 15, if one of the four number is 2 find the other numbers.

In a binomial distribution, if the mean is 8 and the variance is 6, then the number of trials is

NEW JOYTHI PUBLICATION-STATISTICS-QUESTIONS FROM COMPETITIVE EXAMS
  1. If the average of the numbers 1,2,3,…., 98,99,x is 100x, then the valu...

    Text Solution

    |

  2. If the median of (x)/(5),x,(x)/(4),(x)/(2),(x)/(3)(xgt0) is 8, then t...

    Text Solution

    |

  3. The mean of five numbers is 0 and their variance is 2. If three of tho...

    Text Solution

    |

  4. A batsman in his 16^(th) innings makes a score of 70 runs and thereby ...

    Text Solution

    |

  5. If the variance of 1,2,3,4,5,….., x is 10, then the value of x is

    Text Solution

    |

  6. Mean of 10 observations is 50 and their standard deviation is 10 If e...

    Text Solution

    |

  7. If sum(i=1)^(9)(x(i)-5)=9andsum(i=1)^(9)(x(i)-5)^(2)=45, then the sta...

    Text Solution

    |

  8. The standard deviation of 9,16,23,30,37,44,51 is

    Text Solution

    |

  9. In a class of 100 students there are 70 boys whose average marks in a ...

    Text Solution

    |

  10. In an experiment with 15 observation on x, the following results were...

    Text Solution

    |

  11. The median of a set of a set of 9 distinct observations is 20.5 . If e...

    Text Solution

    |

  12. Consider the following statements. (i) Mode can be computed from hi...

    Text Solution

    |

  13. In a series of 2n observations , half of them equal a and remaining ha...

    Text Solution

    |

  14. In a frequency distribution , the mean and median are 21 and 22 respec...

    Text Solution

    |

  15. Let x(1),x(2),…..x(n) be n observations such that sumx(i)^(2)=400andsu...

    Text Solution

    |

  16. Suppose a population A has 100 observations 101,102,….,200, and anothe...

    Text Solution

    |

  17. The average marks of boys in a class is 52 and that of girls is 42. .T...

    Text Solution

    |

  18. The mean of the numbers a,b,8,5,10 is 6 and the variance is 6.80 .Then...

    Text Solution

    |

  19. If the mean deviation of number 1,1+d, 1+2d,…., 1+100d from their mean...

    Text Solution

    |

  20. For two data sets , each of size 5, the variances are given to be 4 an...

    Text Solution

    |