Mathematics
The following table gives the duration of movies in minutes.
| Duration (in minutes) | No. of movies |
|---|---|
| 100-110 | 5 |
| 110-120 | 10 |
| 120-130 | 17 |
| 130-140 | 8 |
| 140-150 | 6 |
| 150-160 | 5 |
Using step–deviation method, find the mean duration of the movies.
Related Questions
The mean of the following frequency distribution is 57.6 and the sum of all the frequencies is 50. Find the values of p and q :
Classes Frequency 0 - 20 7 20 - 40 p 40 - 60 12 60 - 80 q 80 - 100 8 100 - 120 5 The following table gives the life time in days of 100 electricity tubes of a certain make :
Lifetime in days No. of tubes less than 50 8 less than 100 23 less than 150 55 less than 200 81 less than 250 93 less than 300 100 Find the mean lifetime of electricity tubes.
Shown below is a table illustrating the monthly income distribution in a company with 100 employees.
Monthly income (in ₹ 10,000) Number of employees 0-4 55 4-8 15 8-12 06 12-16 08 16-20 12 20-24 4 Using step-deviation method, find the mean monthly income of an employee.
Using the information given in the adjoining histogram, calculate the mean correct to one decimal place.
