Police plan to enforce speed limits by using radar traps at 4 different locations within the city limits. The radar traps at each of the locations L\, L2, L3, and L4 are operated 40%, 30%, 20%, and 30% of the time, and if a person who is speeding on his way to work has probabilities of 0.2, 0.1, 0.5, and 0.2, respectively, of passing through these locations, what is the probability that he will receive a speeding ticket?