Home
Class 10
MATHS
Find the mean (bar(X)) in the following ...

Find the mean `(bar(X))` in the following cases :
(i) `sumf_(i)6,sumf_(i)x_(i)=21` (ii) `sumf_(i)x_(i)=100,sumf_(i)=25`

Text Solution

Verified by Experts

The correct Answer is:
`bar(X)=(sumf_(i)x_(i))/(sumf_(i))=(21)/(6)=(7)/(2)` (ii) `bar(X)=(sumf_(i)x_(i))/(sumf_(i))=(100)/(25)=4`
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Assignment 6.1|4 Videos

  • STATISTICS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Assignment 6.2|5 Videos

  • SIMILARITY

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise SUBJECTIVE TYPE|20 Videos

  • THEOREMS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise CIRCLE|15 Videos

Similar Questions

Explore conceptually related problems

Find bar(u) in the following cases : (i) sumf_(i)u_(i)=-5,sumf_(i)=50 (ii) sumf_(i)u_(i)=21,sumf_(i)=36

Find sumf_(i)d_(i) in the following cases : (i) bar(d)=1.08,sumf_(i)=100 (ii) bar(d)=1.2,sumf_(i)=15

Find the values of n and bar(X) in each of the following cases: (i) sum_(i=1)^(n)(x_(1)-12)=-10 and sum_(i=1)^(n)(x_(1)-3)=62(ii)sum_(i=1)^(n)(x_(1)-10)=30 and sum_(i=1)^(n)(x_(1)-6)=150

Find bar(u)" if sumf_(i)u_(i)=66andsumf_(i)=100.

Find the mean (bar(X)) if sumf_(i)x_(i)=75andsumf_(i)=15 .

In the formula barx=a+((sumf_iu_i)/(sumf_i))xx h, u_i=

Find the value of bar u for the following information : (i) A = 22.5 , x_(i) = 27.5 , g = 5 " "(ii) Sigma f_(i)u_(i) = 54 , Sigma f_(i) = 120

If sumf_(i)x_(i)=3880 and mean (bar(X))=38.8, find sumf_(i)

Find the value of Sigma f_(i) for the following information : (i) Sigma f_(i)d_(i) = 800, bard = 8 " "(ii) Sigma f_(i)d_(i) = - 260, bar d = - 3.25

If sumf_(i)=20 , sumf_(i)x_(i)=120+y and barX=7 , then y=?

NAVNEET PUBLICATION - MAHARASHTRA BOARD-STATISTICS-EXAMPLES FOR PRACTICE (MCQs)
  1. Find the mean (bar(X)) in the following cases : (i) sumf(i)6,sumf(i)...

    Text Solution

    |

  2. A survey of students was made to know which games they like. The numbe...

    Text Solution

    |

  3. The sale by some dealers in a week is represented by a pie diagram. Th...

    Text Solution

    |

  4. The class mark of the class 2000-2500 is taken as assumed mean. What i...

    Text Solution

    |

  5. In the frequency table showing the amount invested in health insurance...

    Text Solution

    |

  6. What is the class mark of the class 100 - 190 ?

    Text Solution

    |

  7. Find the value of the mean barX , " if " Sigma f(i) x(i) = 30 " and " ...

    Text Solution

    |

  8. Which of the following is the formula for finding mean (bar(X)) by ass...

    Text Solution

    |

  9. Method to calculate Mean by Step-Deviation method

    Text Solution

    |

  10. Which of the following is not a measure of central tendency

    Text Solution

    |

  11. The value of mean is 56.8 " and " Sigmax(i)f(i) = 2840. What is the v...

    Text Solution

    |

  12. In a tree plantation programme, 40 students planted various number of ...

    Text Solution

    |

  13. Find the class mark of the class 35-39 . What is the next consecutive ...

    Text Solution

    |

  14. What is the value of g for the class 200 - 250 ? What is the class mar...

    Text Solution

    |

  15. Complete the following activity by filing the boxes : Here, L = ...

    Text Solution

    |

  16. Find the value of Sigma f(i) for the following information : (i) Sig...

    Text Solution

    |

  17. Find the value of Sigmaf(i) d(i) for the following information. (i) ...

    Text Solution

    |

  18. Find the value of bar u for the following information : (i) A = 22.5...

    Text Solution

    |

  19. Find the mean of the data given in the following table. {:("Class",0...

    Text Solution

    |

  20. The following table shows the percentage of vehicles passing a signal....

    Text Solution

    |

  21. The age group of the number of persons in the age group who donated bl...

    Text Solution

    |