If the group data has open end classes, one cannot calculate

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Median

Mode

Mean

Quartiles

answer is B.

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Detailed Solution

As we know group data has open end classes which probably do not have lower limits of the first class or the upper limit of the last class. We also know that median mean and quartiles do not require limits of the class so they can be calculated even when the classes are open ended. So, now we can say that mode is the only one here which requires limits of the classes.
So, the Ans is mode.
Hence option (2) is the correct option.

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