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- Factorization of Polynomials
- Linear Equations In Two Variables
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- Introduction To Euclids Geometry
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- Congruence Of Triangles And Inequalities In A Triangle
- Quadrilaterals
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- Mean Median And Mode Of Ungrouped Data
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RS Aggarwal Solutions Class 9 Mathematics Solutions for Mean Median And Mode Of Ungrouped Data Exercise 18A in Chapter 18 - Mean Median And Mode Of Ungrouped Data
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The average weekly payment to 75 workers in a factory is ₹ 5680. The mean weekly payment to 25 of
them is ₹ 5400 and that of 30 others is ₹ 5700. Find the mean weekly payment of the remaining workers.
Average weekly payment of 75 workers = ₹ 5680
So the total payment = ₹ (75 × 5680) = ₹ 426000
Mean weekly payment of 25 workers = ₹ 5400
So the total payment = ₹ (25 × 5400) = ₹ 135000
Mean weekly payment of 30 workers = ₹ 5700
So the total payment = ₹ (30 × 5700) = ₹ 171000
We know that number of remaining workers = 75 – 25 – 30 = 20
So the total weekly payment of remaining 20 workers = Total weekly payment of 75 workers – total weekly payment of 25 workers – total weekly payment of 30 workers
By substituting the values
Total weekly payment of remaining 2 workers = 426000 – 135000 – 171000 = ₹ 120000
So the mean weekly payment of remaining 20 workers = 120000/20 = ₹ 6000
Therefore, the mean weekly payment of the remaining workers is ₹ 6000.
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