Welcome to freeonlinetest online exam portal, here you will get 2000+ average With formulae. As you know Aptitude is one of the important topics for competitive exams like Banking, SSC CGL, SSC MTS, SSC Group D, Railway Group D, Police Constable Exams, etc. average is also part of it.
Here you will get expected Average Math/ Aptitude questions, prepared by experts which could help in your exam in the aptitude section
If the average of '$n_1$' numbers is $a_1$ and the average of '$n_2$' numbers is $a_2$, then average of total numbers $n_1$ and $n_2$ is
Average = ${n_1a_1 + n_2a_2}/{n_1 + n_2}$
If the given observations (x) are occuring with certain frequency (A) then,
Average = ${A_1x_1 + A_2x_2 + A_3x_3 +...+ A_nx_n}/{x_1 + x_2 +...+ x_n}$ where, $A_1, A_2, A_3, ... A_n$ are frequencies