Home
Class 12
MATHS
The weighted mean of the first n natural...

The weighted mean of the first n natural numbers whose weights are equal to the squares of the corresponding numbers is

A

`(n+1)(2)`

B

`(2n+1)/(2)`

C

`(2n+1)/(3)`

D

`((2n+1)(n+1))/(6)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MEASURES OF CENTRAL TENDENCY

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|21 Videos

  • MEASURES OF CENTRAL TENDENCY

    OBJECTIVE RD SHARMA ENGLISH|Exercise Section I - Solved Mcqs|24 Videos

  • MAXIMA AND MINIMA

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|29 Videos

  • MISCELLANEOUS EQUATIONS AND INEQUATIONS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|29 Videos

Similar Questions

Explore conceptually related problems

The weighted means of of first n natural numbers whose weights are equal to the squares of corresponding numbers is

The S.D. of the first n natural numbers is

The arithmetic mean of first n natural numbers, is

Find the sum of first n natural numbers.

Find the sum of first n natural numbers.

Find the sum of first n natural numbers.

Find the mean of first six natural numbers.

Find the mean of first five natural numbers.

Find the mean of first five natural numbers.

Find the mean of first five natural numbers.

OBJECTIVE RD SHARMA ENGLISH-MEASURES OF CENTRAL TENDENCY-Exercise
  1. The weighted mean of the first n natural numbers whose weights are equ...

    Text Solution

    |

  2. If a variable takes value 0,1,2,3,....,n with frequencies 1,C(n,1),C(n...

    Text Solution

    |

  3. The weighted mean of the first n natural numbers whose weights are equ...

    Text Solution

    |

  4. The mean of n observations is X . If the first item is increased by...

    Text Solution

    |

  5. If bar X1 and bar X2 are the means of two series such that bar X1 lt...

    Text Solution

    |

  6. The mean of the series x1, x2,...xn is barX. If x2 is replaced by lamb...

    Text Solution

    |

  7. The mean income of a group of workers is bar(X) and that of another gr...

    Text Solution

    |

  8. If the variable takes values 0,1,2,…, n with frequencies q^(n),""^(n)C...

    Text Solution

    |

  9. The AM of n observations is M. If the sum of n-4 observations is a, ...

    Text Solution

    |

  10. The sum of squares of the deviation of the values of the variable is w...

    Text Solution

    |

  11. If each of n numbers x(i)=i, is replaced by (i+1)x(i), then the new me...

    Text Solution

    |

  12. The mean age of a combined group of men and women is 25 years. If the ...

    Text Solution

    |

  13. Iin a moderately skewed distribution the values of mean and median ar...

    Text Solution

    |

  14. One of the methods of determining mode is (a) Mode = 2 Median 3 Mean ...

    Text Solution

    |

  15. The positional average of central tendency is

    Text Solution

    |

  16. For dealing with qualitative data the best average is:- a) AM b) GM ...

    Text Solution

    |

  17. If a variable takes discrete values x+4, x-(7)/(2), x-(5)/(2), x-3, x-...

    Text Solution

    |

  18. Which one of the following is not a measure of central value: (a) Me...

    Text Solution

    |

  19. If y = f(x) be a monotonically increasing or decreasing function of ...

    Text Solution

    |

  20. The median can graphically be found from

    Text Solution

    |