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The distribution below gives the weights of 30 students of a class. Find the median weight of the students.

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15 lies in the class 50 – 55 

∴ Median class = 50-55 

l – lower boundary of the median class = 55 

f – frequency of the median class = 8 c

.f = 5 

Class size h = 6

= 50 + 7.5 

= 57.5 

= 50 + 7.5 = 57.5 

∴ Median weight = 57.5 kg.

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