Study the given graph and answer the question that follows.
The number of students who obtained 20 marks or more but less than 60 marks is:
From the given graph add number of student interval
20-30, 30-40, 40-50 , 50-60Â
in the graph 20-30 value 78, 30-40 value 110 , 40-50 value 142, 50-60 value 150Â
then add 78 + 110 +142 + 150 = 480 AnsÂ
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