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In which of these situations is a double bar graph useful?
(i) Enrollment of students in class VII in 2009 and 2010
(ii) Marks obtained in Term I and Term II examinations.
(iii) Marks obtained in all subjects of a term examination.

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(i) and (ii)

(ii) and (iii)

all of the above

none of the above

answer is A.

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Detailed Solution

(i) and (ii) will require double bar graph due to 2 data set being present.

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