Question

A coin is tossed thrice,then what is the probability to get head or trial alternately

Answer 1

Heads and Tails we can get alternately in the following cases:

HTH or THT

Probability of both the above events are:

0.5*0.5*0.5 = 0.125

Therefore total probability = 0.125 + 0.125 = 0.25

Therefore 0.25 is the required probability here.