Mathematics
Given below are the daily wages of 200 workers in a factory :
| Daily Wages (in ₹) | Number of Workers |
|---|---|
| 240 – 300 | 20 |
| 300 – 360 | 30 |
| 360 – 420 | 20 |
| 420 – 480 | 40 |
| 480 – 540 | 90 |
Calculate the mean daily wages.
Related Questions
The number of match sticks contained in 50 match boxes is given below :
Number of match sticks Number of boxes 40 6 42 7 43 12 44 9 45 10 48 6 (i) Using short cut method, find the mean number of match sticks per box.
(ii) How many extra match sticks are to be added to all the contents of 50 match boxes to bring the mean exactly equal to 45 match sticks per box?
The following table gives the marks scored by a set of students in an examination. Calculate the mean of the distribution by using the short cut method.
Marks Number of students 0 – 10 3 10 – 20 8 20 – 30 14 30 – 40 9 40 – 50 4 50 – 60 2 If the mean of the following distribution is 24, find the value of a.
Marks No. of students 0 – 10 7 10 – 20 a 20 – 30 8 30 – 40 10 40 – 50 5 Calculate the mean of the following distribution using step deviation method.
Marks No.of students 0 – 10 10 10 – 20 9 20 – 30 25 30 – 40 30 40 – 50 16 50 – 60 10