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The marks of the students of a class who...

The marks of the students of a class who appeared for a test in English are represented in the following frequency table :

What is/are the modal class(es) ?

A

10.5-20.5 only

B

20.5 - 30.5 only

C

10.5-20.5 and 20.5 -30.5

D

There is no modal class

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