Home
Class 10
MATHS
The following table gives the number of ...

The following table gives the number of pages written by Saria for completing her own book for 30 days.

Find the mean number of pages written per day.

Text Solution

Verified by Experts

Since,

Since, given data is not continuous so we subtract 0.5 from the lower limit and add 0.5 in the upper limit of each class
`therefore ("mean")bar(x)=(sumf_(i)x_(i))/(sumf_(i))=(780)/(30)=26`
Hence, the mean of pages written per day is 26.
Promotional Banner

Topper's Solved these Questions

  • STATISTICS AND PROBABILITY

    NCERT EXEMPLAR ENGLISH|Exercise LONG ASWERS QUESTIONS|14 Videos

  • STATISTICS AND PROBABILITY

    NCERT EXEMPLAR ENGLISH|Exercise VERY SHORT ANSWERS QUESTIONS|14 Videos

  • REAL NUMBERS

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER TYPE QUESTIONS|5 Videos

  • SURFACE AREAS AND VOLUMES

    NCERT EXEMPLAR ENGLISH|Exercise LONG ANSWER TYPE QUESTIONS|20 Videos

Similar Questions

Explore conceptually related problems

Six men pack 312 percels per day Find the number of parcels packed by 11 men per day.

The following table gives the number of finished articles turned out per day be different number of workers in a factors. Find the standard deviation of the daily output of finished articles. Find the variance and standard deviation of the following frequency distribution: Number of article:, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 No. of workers:, 3, 7, 11, 14, 18, 17, 13, 8, 5, 4

The following table gives the number of finished articles turned out per day be different number of workers in a factors. Find the standard deviation of the daily output of finished articles. Find the variance and standard deviation of the following frequency distribution: Number of article:, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 No. of workers:, 3, 7, 11, 14, 18, 17, 13, 8, 5, 4

The following table gives the number of branches and number of plants in the garden of a school. No. of branches (x) : 2 3 4 5 6 No. of plants (f) : 49 43 57 38 13 Calculate the average number of branches per plant.

Amitabh own a garden.In the garden, the number of mango trees is equal to number of mangoes per tree and the cost price per mango is the same as the number of mango trees in the garden. The maintenance cost is ₹ 860 per tree. If Amitabh sells one mango at ₹ 61, the overall loss in the business is ₹ 800. Find the number of mangoes in the garden, if no mangoes were wasted and the number of trees were more than 30.

Abe reads a book every day some page in the morning and some in the evening. He reads 23 pages every morning and 31 page every evening . The number of page completed by Abe after some number of days can be written as a function of the number of pages read in the evening . If the number of days is represented by ' N', the number of page read in the morning be 'M' and the number of pages read in the evenings be 'E' , which of the following the number of days for which Abe read the book ? It is know that if Abe read in the morning , he did not read in the evening and vice versa.

Following table shows the points of each player scored in four games:Now answer the following questions:(i) Find the mean to determine A’s average number of points scored per game.(ii) To find the mean number of points per game for C, would you divide the totalpoints by 3 or by 4? Why?(iii) B played in all the four games. How would you find the mean?(iv) Who is the best performer?

Copy the following table which gives the volumes of gases collected under the same conditions of temperature and pressure and the number of molecules (X) in 20 litres of nitrogen. You are to complete the table giving the number of molecules in the other gases in terms of X.

The following table gives the frequencies of most commonly used letters a,e,I,o,r,t,u, from a page of a book Represent the information above by a bar graph.

A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent.

NCERT EXEMPLAR ENGLISH-STATISTICS AND PROBABILITY-SHORT ANSWERS QUESTIONS
  1. Calculate the mean of the scores of 20 students in a mathematics test

    Text Solution

    |

  2. Calculate the mean of the following data

    Text Solution

    |

  3. The following table gives the number of pages written by Saria for com...

    Text Solution

    |

  4. The daily income of a sample of 50 employees are tabulated as follows....

    Text Solution

    |

  5. An aircraft has 120 passsenger seats. The number of seats occupied dur...

    Text Solution

    |

  6. The weights (in kg) of 50 wrestlers are recorded in the following tabl...

    Text Solution

    |

  7. The mileage (km per litre) of 50 cars of the same model was tested by ...

    Text Solution

    |

  8. The following is the distribution of weights (in kg) of 40 persons. ...

    Text Solution

    |

  9. The following table show tha cumulative frequency distribution of mark...

    Text Solution

    |

  10. From the frequency distribution table from the following data

    Text Solution

    |

  11. Find the unknown entries a,b,c,d,e and f in the following distribution...

    Text Solution

    |

  12. The following are the ages of 300 patients getting medical treatment i...

    Text Solution

    |

  13. Given below is a cumulative frequency distribution showing the mars se...

    Text Solution

    |

  14. Weekly income of 600 families is tabulted below. Compute the medi...

    Text Solution

    |

  15. The maximum bowling speeds, in km per hour, of 33 players at a cricket...

    Text Solution

    |

  16. The monthly income of 100 families are given as below Calculate t...

    Text Solution

    |

  17. The weights of coffee im 70 packets are shown in the following table ...

    Text Solution

    |

  18. Two dice are thrown at the same time. Find the probability of getting ...

    Text Solution

    |

  19. Two dice are thrown simultaneously. What is the probability that the s...

    Text Solution

    |

  20. Two dice are thrown together. Find the probability that the product th...

    Text Solution

    |