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Observe the following frequency polygon ...

Observe the following frequency polygon and write the answers of the questions below it.
`i`. Which class has the maximum number of students?
`ii`. Write the classes having zero frequency.
`iii`. What is the class mark of the class, having frequency of `50` students ?
`iv`. Write the lower and upper class limits of the class whose class mark is `85`.
`v`. How many students are in the class `80-90`?

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Observe the following frequency polygon and write the answers of the questions below it . (1) Which class has the maximum number of students? (2) Write the classes having zero frequency. (3) What is the mark of the class, having frequency of 50 students ? (4) Write the lower and upper class limits of the class whose class mark is 85. (5) How many students are in the class 80 - 90 ?

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