Originally Posted by

**braddy** HI ,

I would like to have some help with this problems:

**A problem in a metal casting process of a part, called severe flashing results in scrapping the part that is being cast. A particular casting operation has in the past scrapped 10% of its parts due to severe flashing. Assume that scrapping a part or not scrapping a part in future operations is a binomial experiment with p=0.10.**

1-Find the probability that no part is scrapped in the next 10 experiments.

**My solution:**

**b(0;10,0.1)**

b(x;n;p) is the binomial distribution.

where x =number os success

n=number of trial

p=probability of success

2- find the probability that at most two parts will be scrapped in the next operations.

**My solution: B(2;10,0.10)**

B(x;n,p) is the cumulative probabilities

3- Find the expected number of scrapped parts in the next 25 operations.

**NO solution**