Chance = Possibility = Probability
There is an equal chance of a woman giving birth to a boys or a girl. probability = 可能性。E.G., We have to prepare for the probability of a further fall in profits. 若無特別修飾 probability 指的是講者有信心會發生的事情，此概念正好與 possibility 相反。例如 A peace agreement now seems a probability rather than a possibility. There is a 20 percent probability that you could develop Arthritis.（關節炎）
