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Find the class mark of the class 80-90....

Find the class mark of the class 80-90.

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To find the class mark of the class interval 80-90, we can follow these steps: ### Step 1: Identify the lower and upper limits - The lower limit (L) of the class is 80. - The upper limit (U) of the class is 90. ### Step 2: Use the formula for class mark The formula to find the class mark (CM) is: ...
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