Question regarding the normal approximation to the binomial probablility distribution
Hello, I am really having trouble with this one:
Q. Data collected over a long period of time show that a particular genetic defect occurs in 1 of every 1000 children. The records of a medical clinic show x=60 children with the defect in a total of 50,000 examined. If the 50,000 were a random sample from the population of children represented by past records,What is the probability of observing a value of X eqaul to 60 or more?
Any help will be greatly appreciated,