Find the mean of the following data by the direct method.Class0—1010—2020—30Frequency4610

Q.2 (B)(v) Find the mean of the following data by the direct method.

Class	0—10	10—20	20—30
Frequency	4	6	10

Doubtly AI Asked 27 Oct 2026 AI-generated · not yet verified ssc 10th Save WhatsApp Report

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Answer: Mean = 18

Class	Class mark \(x_i\)	\(f_i\)	\(x_i f_i\)
0—10	5	4	20
10—20	15	6	90
20—30	25	10	250
	Total	20	360

\(\bar{x} = \dfrac{\sum x_i f_i}{\sum f_i} = \dfrac{360}{20} = 18\).

Doubtly AI · 27 Oct 2026 AI-generated · not yet verified Report

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