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《数学综合与实践活动》(苏科版·九年级·2010版)中有这样一个课题《生日相同的概率有多大》,其内容大致是:先通过模拟实验估计6个人中有2个人同月过生日的概率;再尝试运用相关知识计算6个人中有2个人同月过生日的概率(其后配云图曰:“6个人中有2个人同月过生日的概率大约是0.78.”).随后教材进一步提出一个创新问题:“如果某班有50人,那么至少有2人生日相同的概率是多少?”
In Mathematics Integrated and Practical Activities (Su Ke edition · ninth grade · 2010 edition) there is such a question, “the probability of the same birthday, how much”, its content is roughly: first simulation experiment estimated that 2 out of 6 individuals in the same month Birthday probability; and then try to use the relevant knowledge to calculate the probability of having two of the six individuals in the same month as the birthday (followed by a cloud graph saying: “The probability of two having a birthday in two people out of six is about 0.78.”) The textbook further raises an innovative question: “If there are 50 people in a class, then at least 2 people have the same probability of birthday?” "