Mode—:"The value occuring most frequently in series (or group) of items and around which the other items are distributed most densely".
Demerits of the Mode
1. Incapable of Algebraic treatment—Unlike mean, mode is not capable of further algebraic treatment.
2. Uncertain and vague—Mode is an uncertain and vague measure of central tendency.
3. Restricted use—If the frequency of each item of the series is same than mode cannot be calculated. In this way, the use of mode, is restricted.