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Find the mean of the following.

Class 2 3 4 5 6 7
Frequency 10 6 9 13 7 8

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Σf = 10 + 6 + 9 + 13 + 7 + 8 = 53

∴ Mean = \(\frac{\sum f_ix_1}{\sum f_i}\)\(\frac{237}{53}\) = 4.47

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