Q. 164.6( 14 Votes )

# Find the mean of the following frequency distribution, using the Assumed - mean method:

Answer :

We will find the mean of the frequency distribution using Assumed - mean method, where A = Assumed mean.

We have got

A = 150, Σf_{i} = 80 & Σf_{i}d_{i} = - 300

∵ mean is given by

⇒

⇒

Thus, mean is 146.25.

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