Think about the numbers which can be grouped in the class 105-110.
What do you understand by the lower limit of any class interval?
Think about the formula of class mark. That will help you.
What do you know about range?
By adding the width to the lower limit of a class you will get the lower limit of the next class or the upper limit of the same class.
Recall the class mark formula and follow with corrosponding class marks.
Count on in intervals by looking at the highest value in the data.
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