A person repeatedly and independently flips a coin to decide whether to take a step to the left or to the right from a point X. determine the...

A person repeatedly and independently flips a coin to decide whether to take a step to the left or to the right from a point X. determine the expected number of times the person returns to X.

The person would need equal number of heads and tails to be able to return to the original spot, i.e. evennumber of total trials.If X is the total number trails,⇒ Pr( X = 2 y ) = ( 0.5 y ) * (...