The monthly worldwide average number of airplane crashes of commercial airlines is 3.5. What is the probability that there will be

(a) at least 2 such accidents in the next month

(b) at most 1 accident in the next month? Explain your reasoning!

The monthly worldwide average number of airplane crashes of commercial airlines is 3.5. What is the probability that there will be

(a) at least 2 such accidents in the next month

(b) at most 1 accident in the next month? Explain your reasoning!