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If the median of 60 observations , given...

If the median of 60 observations , given below is 28.5 , find the values of x and y .
`{:("Class interval","Frequency"),(0-10,5),(10-20,x),(20-30,20),(30-40,15),(40-50,y),(50-60,5):}`

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The correct Answer is:
x = 8 , y = 7
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