Which of the following is the class mark of class interval 25 - 30?

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26.5

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27.5

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Solution

The correct option is C 27.5
The class mark of the class interval is given by $\frac{u p p e r c l a s s l i m i t + l o w e r c l a s s l i m i t}{2}$

Upper class limit = 30; Lower class limt = 25

Hence, Class Mark $= \frac{30 + 25}{2}$
$= 27.5$

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Which of the following is the class mark of class interval 25 - 30?

The correct option is C 27.5The class mark of the class interval is given by upper class limit+lower class limit2 Upper class limit = 30; Lower class limt = 25 Hence, Class Mark =30+252 =27.5

The correct option is C 27.5
The class mark of the class interval is given by $\frac{u p p e r c l a s s l i m i t + l o w e r c l a s s l i m i t}{2}$

Upper class limit = 30; Lower class limt = 25

Hence, Class Mark $= \frac{30 + 25}{2}$
$= 27.5$