Over a long period of time in a large multinational corporation, 10% of all sales trainees are rated as outstanding, 75% are rate excellent/good, 10% are rated satisfactory, and 5% are considered unsatisfactory. Find the following probabilities for a sample of n = 10 trainees selected at random:
(a) Two or more are rated as outstanding. (b) None of the trainees are rated as unsatisfactory.
(c) Two are rated outstanding, six are rated excellent/good, one is rated satisfactory, and one is rated unsatisfactory.