Home
Class 10
MATHS
If the mean of the following distributio...

If the mean of the following distribution is 54, find the value of `p :` Class: 0-20 20-40 40-60 60-80 80-100 Frequency: 7 `p` 10 9 13

Text Solution

Verified by Experts

Given,
`|[Class,Frequency(f),class mark(m),mf],[0 - 20, 7 ,10 ,70],[20 - 40 ,p ,30 ,30p ],[40 - 60, 10, 50, 500],[ 60 - 80, 9, 70, 630],[ 80 - 100, 13, 90, 1170],[Total,sum f=39+p,250,sum mf=2370+30p]|`
The mean of given data is given by
...
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 the mean of the following distributions 54, find the value of p: Class: 0-2020-4040-6060-8080-100 Frequency: 7p10913

If the mean of the following distribution is 27, find the value of p . Class: 0-10 10-20 20-30 30-40 40-50 Frequency: 8 p 12 13 10

Find the mean of the following frequency distribution: Classes: 0-20 20-40 40-60 60-80 80-100 Frequency: 15 18 21 29 17

Find the mean of the following frequency distributions: Class interval: 0-10 10-20 20-30 30-40 40-50 Frequency: 9 12 15 10 14

Write the median class of the following distribution: Classes: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Frequency: 4 4 8 10 12 8 4

CH. 14 STATISTICS Q1 Class 0-8 8-16 16-24 24-32 32-40 Frequency 10 12 26 9 15 e mean of above data by: () Direct method () Assumed mean method (ii) Step deviati iop metod. Q2 The following distribution shows the daily pocket allowance of children of a locali ty. The mean pocket allowance is Rs 20. Find the missing frequency Daily Pocket 0-20 20-40 40-60 0-80 80-100 No. Of Children 7 10 9 13 Q3. The following table shows age distribution of persons in a particular region. Find the: (0) mean age (i)modal age (ili) median age Age? Below!0 Below20 Below30 Below 40, Below 50 Belo No, persons ? 250 190 100 40 15 4 Arithmetic mean of the following frequency distribution is 50. Find the missing frequencies C.I. ? 0-20 20-40 40-60 60-80 80-100 Tota

Write the median class for the following frequency distribution: Class-interval: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 Frequency: 5 8 7 12 28 20 10 10

If the median of the following frequency distribution is 28.5 find the missing frequencies: Class interval: 0-10 10-20 20-30 30-40 40-50 50-60 Total Frequency: 5 f_1 20 15 f_2 5 60

Calculate the mean, variance and standard deviation for the following distribution:Class 30-40 40-50 50-60 60-70 70-80 80-90 90-100Frequency 3 7 12 15 8 3 2

If the median of the following data is 32.5, find the missing frequencies. Class interval: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Total Frequency: f_1 5 9 12 f_2 3 2 40

RD SHARMA-STATISTICS-All Questions
  1. Following is the age distribution of a group of students. Draw the c...

    Text Solution

    |

  2. The following observations relate to the height of a group of persons....

    Text Solution

    |

  3. If the mean of the following distribution is 54, find the value of p :...

    Text Solution

    |

  4. If 2costheta-sintheta=x and costheta-3sintheta=ydot Prove that 2x^2+y^...

    Text Solution

    |

  5. Find the mean marks of the students from the following cumulative fr...

    Text Solution

    |

  6. Find the mean marks of students from the following cumulative frequenc...

    Text Solution

    |

  7. The number of students absent in a school was recorded every day for ...

    Text Solution

    |

  8. Compute the median form the following data: Mid-value:          115   ...

    Text Solution

    |

  9. Find the median of the following frequency distribution: Weekly wages ...

    Text Solution

    |

  10. If the median of the following frequency distribution is 46, find the ...

    Text Solution

    |

  11. Calculate the median from the following data: Marks:                0-...

    Text Solution

    |

  12. Find the mode of the following data: 25,16,19,48,19,20,34,15,19,20,21,...

    Text Solution

    |

  13. Compute the median for the following cumulative frequency distribution...

    Text Solution

    |

  14. In Figure, A B C is right angled at ,B C=7c m and A C-A B=1c m . Find...

    Text Solution

    |

  15. In Figure, Pa n dQ are the midpoints of the sides C Aa n dC B respecti...

    Text Solution

    |

  16. Diagonals of a trapezium ABCD with AB || DC intersect each other at...

    Text Solution

    |

  17. The mean of the following frequency distribution is 50. Find the value...

    Text Solution

    |

  18. If s e c4A=cos e c(A-20^@) , where 4A is an acute angle, find the ...

    Text Solution

    |

  19. Find the mode of the following data: Class :0-20, 20-40 ,40-60 ,60-80...

    Text Solution

    |

  20. Theorem 6.9 : In a triangle, if square of one side is equal to the sum...

    Text Solution

    |