Calculate arithmetic mean using direct method. Wages (in ₹) 10 20… - Vidyadip

Question

Calculate arithmetic mean using direct method.

Wages (in ₹)	10	20	30	40	50
Number of workers	4	5	3	2	1

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Answer

Wages (in ₹) (X)	No. of workers (f)	fX
10	4	40
20	5	100
30	3	90
40	2	80
50	1	50
	$\Sigma\text{f}=15$	$\Sigma\text{fX}=360$

$\overline{\text{X}}=\frac{\Sigma\text{fX}}{\Sigma\text{f}}=\frac{360}{15}=24$

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