how do you solve question on pen and paper? no rstudio code please.

3.) A company produces drinking glasses that have a 95% chance of having at least one flaw (bubbles, bulges, discoloration, etc) Find the probability that two glasses chosen randomly will: a.) both have no flaws. b.) both have some flaws. If 20% of the glasses have exactly one flaw, and 15% have exactly two flaws, then find the probability that: c.) a randomly chosen glass will have at least two flaws. d.) if two glasses are chosen at random, they will have a total of exactly 2 flaws