Find the indicated probabilities using the geometric distrib

Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine if the events are unusual. If convenient, use the appropriate probability table or technology to find the probabilities. A major hurricane is a hurricane with wind speeds of 111 miles per hour or greater. During the last century, the mean number of major hurricanes to strike a certain country\'s mainland per year was about 0.67.

Find the probability that in a given year (a) exactly one major hurricane will strike the mainland, (b) at most one major hurricane will strike the mainland, and (c) more than one major hurricane will strike the mainland.

(a) P(exactly one major hurricane will strike the mainland)= (Round to three decimal places as needed.)

Solution

Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine if the events are unusual. If convenient, use the appropriate probability table or technology to find the probabilities. A major hurricane is a hurricane with wind speeds of 111 miles per hour or greater. During the last century, the mean number of major hurricanes to strike a certain country\'s mainland per year was about 0.67.

Poisson distribution is used with mean =0.67

Find the probability that in a given year

exactly one major hurricane will strike the mainland,

P( x=1) = 0.343

at most one major hurricane will strike the mainland, and

P( x < =1) = 0.855

more than one major hurricane will strike the mainland.

P( x>1) = 0.145