Mathematics
The following table gives the daily wages of workers in a factory :
| Wages in ₹ | No. of workers |
|---|---|
| 45 - 50 | 5 |
| 50 - 55 | 8 |
| 55 - 60 | 30 |
| 60 - 65 | 25 |
| 65 - 70 | 14 |
| 70 - 75 | 12 |
| 75 - 80 | 6 |
Calculate their mean by short cut method.
Related Questions
Calculate the mean of the following distribution using step deviation method :
Marks Number of students 0 - 10 10 10 - 20 9 20 - 30 25 30 - 40 30 40 - 50 16 50 - 60 10 The data on the number of patients attending a hospital in a month is given below. Find the average (mean) number of patients attending the hospital in a month using the short cut method.
Take assumed mean as 45. Give your answer correct to 2 decimal places.
Number of patients Number of days 10 - 20 5 20 - 30 2 30 - 40 7 40 - 50 9 50 - 60 2 60 - 70 5 Calculate the mean of the distribution given below using the short cut method.
Marks No. of students 11 - 20 2 21 - 30 6 31 - 40 10 41 - 50 12 51 - 60 9 61 - 70 7 71 - 80 4 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.
No. of days No. of students 0 - 6 11 6 - 10 10 10 - 14 7 14 - 20 4 20 - 28 4 28 - 38 3 38 - 40 1