Question

what will be the class mark for class enterval​

Answer 1

Upper limit + lower limit / 2

Answer 2

We know that the class-mark is the average of limits of class-interval. Hence, the class mark of the interval 50-60 is 55. Note: The average of the class limits of an interval is called a class mark or mid-value of the interval. Class marks are also known as the central value of the interval.

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