Show transcribed image text 5. (40 points) In a box of 20 light bulbs, 5 of them are defective and the rest are working. (a) In how many different ways can we pick 4 light bulbs from the box. (b) If we randomly pick four light bulbs, what is the probability of picking no defective light bulbs? (c) If we randomly pick six light bulbs, what is the probability of picking three or five defective light bulbs? (d) If we randomly pick six light bulbs, what is the probability of picking at-least two defective light bulb?

5. (40 points) In a box of 20 light bulbs, 5 of them are defective and the rest are working. (a) In how many different ways can we pick 4 light bulbs from the box. (b) If we randomly pick four light bulbs, what is the probability of picking no defective light bulbs? (c) If we randomly pick six light bulbs, what is the probability of picking three or five defective light bulbs? (d) If we randomly pick six light bulbs, what is the probability of picking at-least two defective light bulb?