1.

In the following frequency distribution, find the median class. What is the value of model marks ?

Answer»

155.25
156.25
157.25
159.25

Solution :Here, `l=155,f_(1)=30,f_(0)=25,f_(2)=15` and `h=5`
Mode, `""M_(o)=l+h((f_(1)-f_(0))/(2f_(1)-f_(0)-f_(2)))=155+(30-25)/(60-25-15)XX5`
`=155+(5)/(20)xx5`
`=155+1.25=156.25`
Thus (b) is CORRECT option.


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