Disadvantages of Mode
a.It is ill defined.
b.It is indefinite and it is some cases impossible to find a definite value.
c.It is not based on all observation. So it may not be a good representative.
d.It is not capable of further algebraic treatment.
e.Sometimes there can be more than one mode and sometimes there is no mode in the data.
f.As compared to mean it is affected to greater extent by fluctuations of sampling.
g.It is necessary to arrange the data in ascending or descending order of magnitude.