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当前发行的彩票五花八门,花样不断翻新.首先应该肯定的是,这些彩票都有一个共同的特点,那就是在使“彩民”得到娱乐的同时,还可以为国家的公益事业做一点贡献.我们知道,不同种类的彩票,中奖的概率也不一样,获奖的数学期望(以下简称期望)当然也不一样.选择哪种彩票中奖的概率比较大,应该是“彩民”比较关心的问题.本文选择了“七星彩”与“双色球”这两种彩票,对购买这两种彩票的获奖期望问题进行一下比较.
The current lottery lottery, the pattern constantly refurbished.First of all should be sure that these lottery have a common characteristic, that is, to make “Lottery ” to be entertained at the same time, but also for the country’s public welfare to make a contribution. We know that different types of lotteries have different winning probability, and the mathematical expectation of winners (of course, the expectation is not the same) .While the probability of winning the lottery is relatively large, it should be a problem that “Lottery ” is more concerned about This paper chooses two kinds of lottery tickets, “Seven Stars” and “Two - Tone Ball”, to compare the winning expectation of buying these two kinds of lottery tickets.