how to solve?

how to solve?

Following is the distribution of marks obtained by SO students in mercantile law:
Marks more than :
0 10 20
30 40 50
No. of students :
50 46 40
20 10 3Calculate the median marks. If 60% of the students pass the test, find the minimum marks obtained by a pass candidate. (Ans.: M = 27.5 ; 25)

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