Q. 215.0( 3 Votes )

If the mean of a

Answer :

If x1, x2, … , xn are observations with frequencies f1, f2, … , fn i.e. x1 occurs f1 times and x2 occurs f2 times and so on, then we have

mean() of observations is given by

Given, mean = 8.1

Putting this values in formula:

162 = 132 + 5k

5k = 30

k = 6

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