Q. 84.1( 18 Votes )

Let L be the lower class boundary of a class in a frequency distribution and m be the midpoint of the class. Which one of the following is the upper class boundary of the class?


C. 2m – L

D. m – 2L

Answer :


Mid-point of class = m

We know that,

Mid-point = upper class limit + lower class limit)

m = upper class limit + lower class limit)

lower class limit = l (given)

upper class limit + l = 2m

upper class limit = 2m – l .

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