Awombat in the san diego zoo spends the day walking from a burrow to a food tray, eating, walking back to the burrow, resting and repeating the cycle. the amount of time to walk from secs. the wombat, with 1 3 the burrow to the tray (and also from the tray to the burrow) is 20 probability , will momentarily stand still (for a negligibly small time) during a walk to or from the tray, with all times being equally likely (and independently of what happened in the past). a photographer arrives at a random time and will take a picture at the first time the wombat will stand still. what is the expected value of the length of time the pohotographer has to wait to snap the wombat’s picture ?