Home
Class 10
MATHS
The mean of a discrete frequency distrib...

The mean of a discrete frequency distribution `x_i//f_i ; i=1,\ 2,\ ddot,\ n` is given by (a) `(sumf_i x_i)/(sumf_i)` (b) `1/n\ sum_(i=1)^nf_i x_i` (c) `(sumi=1nf_i x_i)/(sumi=1n x_i)` (d) `(sumi=1nf_i x_i)/(sumi=1n i)`

Promotional Banner

Topper's Solved these Questions

  • SOME APPLICATIONS OF TRIGONOMETRY

    RD SHARMA|Exercise All Questions|154 Videos

  • SURFACE AREAS AND VOLUMES

    RD SHARMA|Exercise All Questions|417 Videos

Similar Questions

Explore conceptually related problems

If sum_(i=1)^(n)sin x_(i)=n then sum_(i=1)^(n)cot x_(i)=

If sum_(i=1)^(n)sin x_(i)=n then sum_(i=1)^(n)cot x_(i)=

If the mean of a frequency distribution is 8.1 and sumf_i x_i=132+5k ,\ \ sumf_i=20 , then k= (a) 3 (b) 4 (c) 5 (d) 6

If barx=1/n sum_(i=1)^n x_i then prove that sum_(i=1)^n (x_i-barx)=0

sum_(i=1)^(n) sum_(i=1)^(n) i is equal to

sum_(i=1)^(n)cos theta_(i)=n then sum_(i=1)^(n)sin theta_(i)

The mean deviation for n observations x_(1),x_(2),.........,x_(n) from their mean X is given by (a)sum_(i=1)^(n)(x_(i)-X)(b)(1)/(n)sum_(i=1)^(n)(x_(i)-X)(c)sum_(i=1)^(n)(x_(i)-X)^(2)(c)(1)/(n)sum_(i=1)^(n)(x_(i)-X)^(2)

If sum_(i=1)^(2n)cos^(-1)x_(i)=0 , then sum_(i=1)^(2n)x_(i) is :

Let x_(1),x_(2),x_(n) be n observations and X be their arithmetic mean.The standard mean is given by sum_(i=1)^(n)(x_(i)-X)^(2) (b) (1)/(n)sum_(i=1)^(n)(x_(i)-X)^(2) (c) sqrt((1)/(n)sum_(i=1)^(n)(x_(i)-X)^(2))( c) (1)/(n)sum_(i=1)^(n)xi2-X^(2)

RD SHARMA-STATISTICS-All Questions
  1. If the mean of the following distribution is 2.6, then the value of y ...

    Text Solution

    |

  2. The relationship between mean, median and mode for a moderately skewed...

    Text Solution

    |

  3. The mean of a discrete frequency distribution xi//fi ; i=1,\ 2,\ ddot,...

    Text Solution

    |

  4. If the arithmetic mean of x ,\ x+3,\ x+6,\ x+9, and x+12 is 10, the x=...

    Text Solution

    |

  5. If the median of the data: 24, 25, 26, x+2 , x+3 , 30, 31, 34 is 27.5,...

    Text Solution

    |

  6. If the median of the data: 6, 7, x-2,\ x , 17, 20, written in ascendin...

    Text Solution

    |

  7. The median of first 10 prime numbers is (a) 11           (b) 12       ...

    Text Solution

    |

  8. If the mode of the data: 64 ,\ 60 ,\ 48 ,\ x ,\ 43 ,\ 48 ,\ 43 ,\ 34 i...

    Text Solution

    |

  9. If the mode of the data: 16 ,\ 15 ,\ 17 ,\ 16 ,\ 15 ,\ x ,\ 19 ,\ 17 ,...

    Text Solution

    |

  10. If the mean of a frequency distribution is 8.1 and sumfi xi=132+5k ,\ ...

    Text Solution

    |

  11. If the mean of 6,\ 7,\ x ,\ 8,\ y ,\ 14 is 9, then (a) x+y=21 (b) x+y...

    Text Solution

    |

  12. The arithmetic mean of 1,2,3,...n is (a)(n+1)/2 (b) (n-1)/2 (c) n/...

    Text Solution

    |

  13. If the mean of first n natural numbers is (5n)/9 , then n= (a) 5 (b) ...

    Text Solution

    |

  14. The arithmetic mean and mode of a data are 24 and 12 respectively, the...

    Text Solution

    |

  15. The mean of first n odd natural number is (a) (n+1)/2 (b) n/2 (c) n ...

    Text Solution

    |

  16. The mean of first n odd natural numbers is (n^2)/(81) , then n= (a) 9...

    Text Solution

    |

  17. If the difference of mode and median of a data is 24, then the diff...

    Text Solution

    |

  18. If the arithmetic mean of 7,\ 8,\ x ,\ 11 ,\ 14 is x , then x= (a) 9 ...

    Text Solution

    |

  19. If mode of a series exceeds its mean by 12, then mode exceeds the m...

    Text Solution

    |

  20. If the mean of first n natural number is 15, then n= (a) 15 (b) 30 (c...

    Text Solution

    |