1 1 vote A drunken man walks on a straight lane. At every integer time (in seconds) he moves a distance of $1$ unit randomly, either forwards or backwards. What is the expectation of the square of the distance after $100$ seconds from the initial position? Hint: The position at time $100$ is a sum of independent and identically distributed random variables. $100$ $\frac{\sqrt{300}}{4}$ $40$ $200$ $20 \pi$ Probability and Statistics tifrece2022 probability-and-statistics random-variable expectation + – admin 333 views answer comment Share Follow Add Sync Questions Print 0 reply Please log in or register to add a comment.
