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.
Measures of Central Tendency
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Answer
| Daily Wages (in ₹) | Number of Workers (f) | Class mark (x) | d = x - A | fd |
|---|---|---|---|---|
| 240 – 300 | 20 | 270 | -120 | -2400 |
| 300 – 360 | 30 | 330 | -60 | -1800 |
| 360 – 420 | 20 | A = 390 | 0 | 0 |
| 420 – 480 | 40 | 450 | 60 | 2400 |
| 480 – 540 | 90 | 510 | 120 | 10800 |
| Total | ∑f = 200 | ∑fd = 9000 |
By formula,
Hence, mean daily wage is ₹435.
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