1. List all the samples from {a, b, c, d, e} when (a) 2 out of 5 are selected, (b) 3 out of 5 are selected. Count the number of samples in each case.
2. Out of 12 people applying for an assembly iob, 3 cannot do the work. Suppose two persons will be hired.
(a) How many distinct pairs are possible?
(b) In how many of the pairs will 0 or 1 people not be-able to do the work?
(c) If two persons are chosen in a random manner, what is the probability that neither will be able to do the job?