hat is the mean of the set of data? mplete the table. Frequency Class Mark Class Interval Lower Boundary (LB) EX (1) (X) 70-76 15 63-69 157 A 56-62 304 B 49-55 508 C 42-48 357 35-41 156 G 28-34 84 E 21-27 59 H 14-20 17

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