Q15 of 145 Page 410

Consider the following frequency distribution:





















Class



0 - 10



10 - 20



20 - 30



30 - 40



40 - 50



50 - 60



Frequency



3



9



15



30



18



5



The modal class is

For modal class,


Here, the maximum class frequency is 30.


The class corresponding to this frequency is the modal class. ⇒ modal class = 30 - 40


∴ modal class = 30 - 40

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If the 'less than type' ogive and 'more than type' ogive intersect each other at (20.5, 15.5) then the median of the given data is

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Consider the frequency distribution of the heights of 60 students of a class:






































Height (in cm)



No of Students



Cumulative Frequency



150 - 155



16



16



155 - 160



12



28



160 - 165



9



37



165 - 170



7



44



170 - 175



10



54



175 - 180



6



60



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Mode = ?

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Median = ?