Question

why is resistance more in series combination and less in parallel combination

Answer 1

because in parallel it is equally distributed but not in series

Answer 2

Answer:

$\huge\mathtt \red {\xcancel{ \longmapsto\frac{V\left(R_{2}+R_{3}\right)}{R_{1}R_{2}+R_{1}R_{3}+R_{2}R_{3}}}}$