Posted: January 29th, 2016

The mumps vaccine is effective 80% of the time. If 6 people had the vaccine, what is the probability at least 2 will get the mumps

The mumps vaccine is effective 80% of the time. If 6 people had the vaccine, what is the probability at least 2 will get the mumps
4. Find p(X greater or equal to 3) ( At least 3 failures before succeeding for the fourth time).
5. Suppose the expected number of bugs on a leaf 2.5 and the number of bugs is well modeled by a geometric distribution. What is the probability a leaf will have at least3 bugs?
6. Customer arrivals at a checkout counter have a poison distribution of an average of 7 per hour
a) Find the probability of no more than 3 customers arrive