Home
Class 9
MATHS
If x1, x2, x3,....xn are n values of a v...

If x1, x2, x3,....xn are n values of a variable X such that Find the value of n and the mean.

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • LINES AND ANGLES

    RD SHARMA ENGLISH|Exercise All Questions|183 Videos

  • NUMBER SYSTEM

    RD SHARMA ENGLISH|Exercise All Questions|130 Videos

Similar Questions

Explore conceptually related problems

If x_1,x_2,.......,x_n are n values of a variable X such that sum_(i=1)^n (x_i-2)=110 and sum_(i=1)^n(x_i-5) =20 . Find the value of n and the mean.

If x_1, x_2, ,\ x_n are n values of a variable X\ a n d\ y_1, y_2, ......,yn are n values of variable Y such that y_i=a x_i+b , i=1,2,\...., n then write Va r\ (Y) in terms of Va r(X)

If x_(1), x_(2), ………,x_(n) are n values of a variable x such that sum(x_(i)-3) = 170 and sum(x_(i)-6) = 50. Find the value of n and the mean of n values.

Let x_1, x_2, x_3, , be n values of a variable X. If these values are changed to x_1+a ,x_2+a , ....., x_n+a ,w h e r ea in R , show that the variance remains unchanged.

Let x_1,\ x_2,\....,\ x_n values of variable X and let 'a' be non zero real number. Then prove that the variance of the observations a x_1,\ a x_2, ... ,\ a x_n is a^2 Var (X) . Also, find their standard deviation.

Let x_1,\ x_2,\....,\ x_n values of variable X and let 'a' be non zero real number. Then prove that the variance of the observations a x_1,\ a x_2, ... ,\ a x_n is a^2 Var (X) . Also, find their standard deviation.

Let x_1,\ x_2,\....,\ x_n values of variable X and let 'a' be non zero real number. Then prove that the variance of the observations a x_1,\ a x_2, ... ,\ a x_n is a^2 Var (X) . Also, find their standard deviation.

If x_1, x_2, x_3,........x_n are the roots of x^n + ax + b = 0 , then the value of (x_1 - x_2)(x_1 - x_3) (x_1 - x_4) .......(x_1 – x_n) is equal to

The sum of deviations of a set of values x_(1), x_(2), x_(3), …… x_(n) measured from 50 is -10 and the sum of deviations of the values from 46 is 70. Find the value of n and the mean.

The sum of the deviations of a set of n values x_1, x_2 ,.........x_n measured from 50 is-10 and the sum of deviations of the values from 46 is 70.Find the values of n and the mean.

RD SHARMA ENGLISH-MEASURES OF CENTRAL TENDENCY-All Questions
  1. The mean of 5 number is 18. If one numbers is excluded, their me...

    Text Solution

    |

  2. If the mean of five observations x , x + 2 , x + 4 , x + 6 , x + 8...

    Text Solution

    |

  3. If x1, x2, x3,....xn are n values of a variable X such that Find the ...

    Text Solution

    |

  4. The sum of the deviations of a set of n values x1, x2 ,xn measured fro...

    Text Solution

    |

  5. If the heights of 5 persons are 140cm, 150cm, 152cm, 158cm and 161c...

    Text Solution

    |

  6. Find the mean of 994, 996, 998, 1002 and 1000

    Text Solution

    |

  7. Find the mean of first five natural numbers.

    Text Solution

    |

  8. Find the mean of all factors of 10.

    Text Solution

    |

  9. Find the mean of first 10 even natural numbers.

    Text Solution

    |

  10. Find the mean of x, x+2, x+4, x+6, x+8

    Text Solution

    |

  11. Find the mean of first five multiples of 3.

    Text Solution

    |

  12. Following are the weights (in kg) of 10 new born babies in a hospit...

    Text Solution

    |

  13. The percentage of marks obtained by students of a class in mathemat...

    Text Solution

    |

  14. The numbers of children in 10 families of a locality are: 2, 4, 3, 4...

    Text Solution

    |

  15. If M is the mean of x1 , x2 , x3 , x4 , x5 and x6, prove that (x1 − M)...

    Text Solution

    |

  16. Duration of sunshine (in hours) in Amritsar for first 10 days of Aug...

    Text Solution

    |

  17. Explain, by taking a suitable example, how the arithmetic mean alte...

    Text Solution

    |

  18. The mean of marks scored by 100 students was found to be 40. Later ...

    Text Solution

    |

  19. The traffic police recorded the speed (in km/hr) of 10 motorists as ...

    Text Solution

    |

  20. The mean of five numbers is 27. If one number is excluded, their me...

    Text Solution

    |