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Find the Class-mark of 80-90. - Algebra

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Question

Find the class-mark of 80-90.

Solution

Class mark =
`{"Lower class limit + Upper class limit"} /2`
`= {80 + 90} /2`
= 85

  Is there an error in this question or solution?
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Find the Class-mark of 80-90. Concept: Arithmetic Progression Examples and Solutions.
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