Mathematics
Find the mean of the following frequency distribution :
| Variate | frequency |
|---|---|
| 5 | 7 |
| 6 | 8 |
| 7 | 14 |
| 8 | 11 |
| 9 | 10 |
Related Questions
The mean of five numbers is 18. On excluding one number, the mean becomes 16. Find the excluded number.
The ages of 40 students of a group are given below :
Age (in years) Number of students 12 6 13 8 14 5 15 7 16 9 17 5 Find the mean age of the group.
In a book of 300 pages, the distribution of misprints is shown below :
Number of misprints per page Number of pages 0 154 1 95 2 36 3 7 4 6 5 2 Find the average number of misprints per page.
The following table gives the wages of different categories of workers in a factory :
Category Wages in ₹/day Number of workers A 250 2 B 300 4 C 350 8 D 400 12 E 450 10 F 500 6 G 550 8 (i) Calculate the mean wage.
(ii) If the number of workers in each category is doubled, what would be the new mean wage?