Statistics - Median

The following back-to-back stem and leaf diagram represents the marks obtained by a class of students so far at Mathematics examination.

1. Find the median marks for boys and girls respectively.

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2. Find the modal marks for boys and girls respectively.

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3. Did the boys or the girls perform better for the Mathematics examination?

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4. Approximately the top \(20\%\) of the students in the class will be participating in the Mathematics Olympiad competition. What was the minimum score of the student who managed to participate in the competition?

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