What is the value of D? Complete the table. Class Frequency Lower Boundary (LB) Interval 70-76 15 63-69 157 A 56-62 304 49-55 508 42-48 357 35-41 156 G 28-34 84 21-27 59 14-20 17 7-13 8 i= N= Class Mark (X) B H EX E

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