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NCERT Exemplar Solutions Class 10 Mathematics Solutions for Statistics and Probability - Exercise 13.1 in Chapter 13 - Statistics and Probability
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In the formula \overline{x}=a+\frac{f_id_i}{f_i}
For finding the mean of grouped data di’s are deviations from a of
Answer:
We know,
di = xi – a
Where,
xi are data and ‘a’ is the assumed mean
So, di are the deviations from of mid – points of the classes.
Hence, the option (C) is correct
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