When resistances are connected in series, then the current through the circuit remains same. If we take two resistances R1( more) and R2( less resistance), then there will be more obstruction offered to the flow of electrons in R1 than R2 i.e., the electrons will move more easily in R1 and thus faster in R1 ( due to less collisions) and thus the rate of flow of electrons will be more i.e., more current ( which is defined as the rate of flow of charge ) will flow. Then should the current glowing through the different resistanced in series be different ?