Q5. A company produces 200 light bulbs, out of which 15 are defective. If a quality control inspector randomly selects 5 bulbs without replacement, what is the probability that at least 3 of the 5 bulbs selected are defective? Now, the company has upgraded the facility and started producing 2000 light bulbs, out of which 20 are defective. Determine the probability that a sample of 10 will have at least 4 defects.