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Find the mean of the following frequency...

Find the mean of the following frequency distribution :
`{:("Class ",0-20,20-40,40-60,60-80,80-100),("Frequency "," "15," "18," "21," "29," "17):}`

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The correct Answer is:
53,53,53
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KUMAR PRAKASHAN-STATISTICS-Test your Skills
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  2. The mean of the following distribution is 18. The frequency f in the ...

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  3. Find the mean marks of students for the following distribution. {:(...

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  4. An aircraft has 120 passenger seats. The number of seats occupied du...

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  5. The frequency distribution of the lifetimes of 400 T.V. picture tube...

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  6. During a medical check up to 35 students, their weights were recorded...

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  7. Find the missing frequency f for the following data if the mode for t...

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  8. The following table gives the heights (in cm) of a group of 55 stud...

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  9. Find the mode of the following data : {:("Marks ","Number of student...

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  10. If the mode of the following data is 45. find x and y given sumf(t) =...

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  11. The table below shows the salartes of 280 persons : {:("Salary (in...

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  12. The median of the following data is 50. find the values of p and q if ...

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  13. Size of agriultural holdings in a survey of 200 families is given i...

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  14. If the median of the following data is 240 then find the value of f. ...

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  15. Find the median of the following frequency distribution : {:("Weekl...

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  16. The daily rainfall record of a ciry for 66 days is given in the fol...

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  17. The distribution of heights (in cm) of 96 children is given below :...

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  18. During the medical check-up of 36 students of a class. their weight...

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