Probability, Probability Theory, Random Variable, Probability Distributions, Mathematics.
until the r’th success. In this case, we want to observe 3 mutated flues, so r = 3. The probability of mutation in one fly is p = 0.05. We want to find the probability that it will take at least 10 generations, which means we need to find P(X < 10), where X represents the number of generations