A blood group is a classification system that identifies the type of blood based on the presence or absence of certain markers on red blood cells. Blood types predict whether a serious reaction will occur in a blood transfusion. In a sample of \(100\) people, \(50\) had type \(O\) blood, \(22\) had type \(A\), \(12\) had type \(B\) and rest had type \(AB\) blood group.
Based on the given information, solve the following questions:
1. What is the probability that a person chosen at random had type \(O\) blood?
2. What is the probability that a person chosen at random had type \(AB\) blood group?
3. What is the probability that a person chosen at random had neither type \(A\) nor type \(B\) blood group?
4. What is the probability that person chosen at random had either type \(A\) or type \(B\) or type \(O\) blood group?