Question

The mean wage of 100 workers is Rs 324.The mean wage of 60 workers is Rs340. Find the mean wage of remaining 40 workers....?
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Answer 1

Answer:

315

Explanation:

Answer 2

The mean wage of remaining workers is Rs 300

Explanation:

Given,

Mean wage (X) of 100 workers is Rs 324, this combine mean

Mean wage (X1) of 60 workers is Rs 340

And the number (N1) is 60, (N2) is 40

Find X2 , not given

• Computing the combined mean as:

Combined Mean = N1 × X1 + N2 × X2 / N1 + N2

Rs 324 = 60 × Rs340 + 40 × X2 / 60 + 40

Rs 324 = Rs20,400 + 40 X2 / 100

Rs324 × 100 = Rs20,400 + 40X2

Rs32,400 - Rs20,400 = 40X2

Rs 12,000 = 40 X2

X2 = Rs12,000 / 40

X2 = 300

• Therefore, the mean wage of 40 workers is Rs 300