A firm offers a choice of 10 free software packages to buyers of their new home computer. There are 25 packages from which to choose. In how many ways can the selection be made? Five of the packages are computer games. How many selections are possible if exactly three computer games are selected? 21. A project manager has 10 chemical engineers on her staff. Four are women and six are men. These engineers are equally qualified. In a random selection of three workers. what is the probability that no women will be selected? Would you consider it unusual for no women to be selected under these circumstances? Explain.