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Solution


Q.

The sum of the lower limit of median class and the upper limit of the modal class of the following data is: 

Marks  0 – 10  10 – 20  20 – 30  30 – 40  40 – 50  50 – 60
No. of students     8      10      12      22      30      18

 
1 70  
2 80  
3 90  
4 100  

Ans.

(2)      80