Travel and Transportation Bad weather is to blame for some of the worst highway crashes in Canada. In December 2012 there was a 27-vehicle pile-up on Highway 40, and in February 2013 a 50-car pile-up shut down Highway 401 near Woodstock, Ontario. Highway 63 in Alberta has a notorious reputation; there are approximately four accidents every week on this road.34 Suppose a week is randomly selected.
a. Find the probability that there are no more than four crashes.
b. Find the probability that the number of crashes is more than μ + 2 σ.
c. To obtain government funding for safety improvements, there must be five weeks in a row with six or more crashes. What is the probability of this happening?