Q. If a coin be tossed $n$ times, then probability that the head comes odd times is
A) $1/2$
B) $1/2^{n}$
C) $1/2^{n - 1}$
D) None of these
Explanation
(a)
A coin is tossed $n$ times.
$\therefore\$ Total number of ways $= 2^{n}$
If head comes odd times, then favourable ways $= 2^{n - 1}.$
$\therefore\$Required probability of getting odd times head $= \frac{2^{n - 1}}{2^{n\ \ }} = \frac{1}{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.