2. A sports team’s practice policy is that practice shall not be
canceled except in the event of severe inclement weather. The
probabilities of severe thunderstorms, snow, hail, and excessive
wind are 35%, 25%, 10%, and 30%, respectively. The probabilities of
practice being canceled in each of these scenarios are 25%, 30%,
70%, and 20%, respectively. Assuming that one of the four scenarios
is guaranteed to occur, what is the probability that practice will
be canceled?