Q. 34.4( 39 Votes )

If the mean of th

Answer :

Given is the frequency distribution table for ungrouped data.

We have

Mean of such ungrouped data is given by

[ Mean = 7.2]

7.2(40 + K) = 260 + 10K

288 + 7.2K = 260 + 10K

10K – 7.2K = 288 – 260

2.8K = 28

K = 28/2.8

K = 10

Thus, K = 10.

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