CGPSC Prelims Paper II 2014 Solved Paper

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Question Numbers: 17-21
The following figure shows the ratio of marks of History and Geography of 7 students in an examination.

The question based on the above shown figure. Answer these questions.
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Question : 20 of 100
 
Marks: +1, -0
The difference of the maximum ratio and minimum ratio of History/Geography is
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