Question

in the group of traids A,B,C if the mass A and C are 80 and 150 then the mass of element B is

Answer 1

80+150/2
this is the formula
average of A and C

Answer 2

if the mass of A is 80 and C is 150 then the mass of B will be = to A+C/2
80+150/2
230/2
=115