If $1 - 5, 6 - 10, 11 - 15, . . .$ are the classes of a frequency distribution then the size of the class is _____

4

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5

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3

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2.5

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Solution

The correct option is A $5$
As the classes are of inclusive form,
Size of the class is $= (U p p e r l i m i t - L o w e r l i m i t + 1)$
So, size of the class $= (5 - 1 + 1) = 5$

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