Shop by Category | eBay

You are bidding on four items available on eBay. You think that for each bid, you have a 25 % chance of winning it, and the outcomes of the four bids are independent events. Let X denote the number of winning bids out of the four items you bid on. a. Explain why the distribution of X can be modeled by the binomial distribution. b. Find the probability that you win exactly 2 bids. c. Find the probability that you win 2 bids or fewer. d. Find the probability that you win more than 2 bids. | Numera