1) The probabilities of the number of computers 0, 1, 2, 3, 4 or 5 sold in a day are 0.10, 0.20, 0.45, 0.15, 0.05 and
0.05, respectively.

a. What is the probability that fewer than 5 computers will be sold?
b. What is the probability that at most 2 computers will be sold?
c. What is the probability that exactly 3 computers will be sold?

2) The probabilities of a machine manufacturing 0, 1, 2, 3, 4 or 5 defective parts in one day are 0.48, 0.17, 0.04, 0.25,
0.01 and 0.05, respectively.

a. What is the probability that there is at most 3 defective parts in a day?
b. What is the probability that there is at least 4 defective parts in a day?
c. What is the probability that there are fewer than 2 defective parts in a day?​