police plan to enforce speed limits using radar traps at four different locations, L1, L2, L3, L4. THE RADAR TRAPS WILL BE OPERATED 40%,20%,20%,30% OF THE TIME, RESPECTIVELY. IF A PERSON WHO IS SPEEDING ON HER WAY TO WORK HAS PROBABILITIES OF 0.2,0.1,0.4, AND 0.3 RESPECTIVELY, OF PASSING THROUGH THESE LOCATIONS, WHAT IS THE PROBABILITY THAT SHE WILL RECEIVE A SPEEDING TICKET?