Suppose that test scores are normally distributed, with a mean of 75 and a standard deviation of 8 points. Find the probability of someone getting a score between 78 and 84. 5. The table below gives the probabilities for the number of cars waiting at a light on Day Road. X=cars 0 1 2 3 4 5 P(X) 0.1 0.33 0.25 0.12 0.11 0.09 a. What is the probability that there will be 3 or fewer cars waiting? b. What.