Cumulative Binomial Probability Major hurricanes (Category 4, 5, or 6) have sustained windspeeds of at least 111 mph. 22% of tropical storms turn into a major hurricane. (c) Suppose NOAA predicts 18 tropical storms this year. A team of pilots who fly into hurricanes to collect data is preparing for four major hurricanes. Will the preparation be sufficient? Justify your answer. The plans will be insufficient if there are more than four major hurricanes. Let X = the number of major hurricanes this year. P(X > 4) = (158) 0.225 (1 0.22) 13 + + (18) 0.2218 (1 -0.22)0 = 0.36