Q. There are 5 roads leading to0 a town from a village. The number of different ways in which a village can go to the town and return back, is
A) 20
B) 25
C) 5
D) 10
Explanation
(b)
The villagers can go to the town in $\ ^{5}C_{1}$ ways and they return back in $\ ^{5}C_{1}$ ways.
$\therefore$ Total number of ways$= \ ^{5}C_{1} \times \ ^{5}C_{1} = 25$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.