Question

29. Find the mean of the following data by step deviation method :

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{ALIGARH MUSLIM UNIVERSITY BOARD OF SECONDARY AND SENIOR SECONDARY EDUCATION, SAMPLE PAPER}

Answer 1

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Answer 2

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Mean = A + $( \frac{fiui}{fi} ) \times h$

= 225 + $(\frac{ - 7}{25}) \times 50$

= 225 + ( -7 ) × 2

= 225 + ( -14)

= 225 - 14

= 211

Therefore, Mean = 211...

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