A company produces smartphones, and its quality control process classifies each smartphone as either "Defective" (D) or "Non-defective" (ND). The probability of a randomly selected smartphone being defective is P(D) = 0.10.
i.Calculate the probability that two randomly selected smartphones are both non- defective.
ii. Given that the first smartphone is non-defective, calculate the probability that the
second smartphone is defective. (4 marks)
iii. The company produces smartphones in batches of 20. Determine the probability that,in a randomly selected batch, at least two smartphones are defective.