Elementary Statistics 問題

The quality Control manager of a chocolate company is inspecting a batch of chocolate bar that has just been manufactured. If the production process is in control, the avg number of nuts per chocolate-bar is 5.0 /

What is the probability that in any particular chocolate bar being inspected:

1. fewer than 5 nuts will be found
2. exactly five nuts will be found
3. five or more nuts will be found
4. four or five nuts will be found
5. How many chocolate-bars in a batch of 100 being sampled should the manager expect to discard if company policy requires that all chocolate bar sold must have at least four nuts.


求解答.