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The lengths of 40 leaves of a plant are ...

The lengths of 40 leaves of a plant are measured correct to the nearest millimetre, and the data obtained is represented in the following table . Find the median length of the leaves. (Hint : The data needs to be converted to continuous classes for finding the median, since the formula assumes continuous classes, The classes then change to 117.5 -126.5, 126.5-135.5,....171.5 - 180.5.)

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