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The class mark of class $140 - 150$ is

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detailed solution

Correct option is C

Class Interval $: 140 - 150$

Class Mark $(x_{i}) = \frac{L . L + U . L}{2}$

$= \frac{140 + 150}{2}$

$= \frac{290}{2}$

$= 145$

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The class mark of class140−150 is