Probability using Poisson distribution.
1. Assume that the number of airplanes arriving at the Indianapolis airport per minute is a Poisson process. The average number of airplanes arriving per minute is 3. The possibility that more than 6 planes arrive in the next minute is _____.
2. There are 6 children in a family. The number of children defines a population. The number of simple random samples of size 2 (two children at a time) which is possible equals