Question

A coin is tossed n times.What is the chance that head will present itself an odd number of time.

Answer 1

The n times respresent them as (n-1)

for example,

if 3 times,

(ttt),(tth),(tht),(htt),

(hhh),(hht),(hth),(thh).

if head repesent them as a odd number then,

(n-1)= head is odd at 4 times = 4-1 =3