If you’re pregnant, theprobability of having a boy or girlis the same: 50%. However, if you already have one child (say, a boy), your odds change. Given that your first child is a boy, your odds of having another boy drop to one third (33.33%). The reason for th...
The probability of having one girl, then one boy is 1/4, at which point you have a ratio of 1 boy per 2 births. Multiplying the probabilities by the ratios and summing from 1 birth to infinity, you get an expectation of approximately 69.31% boys. Problem is, this is the expectation ...
The probability distribution function (or just distribution) of an r.v. X is a set function PX which assigns values to subsets B of R according to relation (3.1); the value assigned to B is denoted by PX(B). (ii) By taking B to be an interval of the form (-∞,x]; i.e., ...
In Example 23.2.1 the overall probability of a particular value of a discrete random variable was computed as a product in which one factor was the number of equally likely ways in which that value could be obtained, and the other factor was the probability of each mutually exclusive occurrenc...
If you assume that the prior probability of a child being a boy is 1/2, then the probability that she has two boys, on the information given, is 1/3. The prior probabilities were: 1/4 two boys, 1/2 one boy one girl, 1/4 two girls. The mathematician's "Yes" response has proba...
A woman has two babies.One of them is a girl, what is the probability that the other is a boy? 0.5 这两个孩子的性别没有关联,所以无论一个是什么,另外一个的概率都是 0.5 A family has two children of whom you know at least one is a girl. What is the probability that both are girl...
In a family with 5 children, what is the probability the eldest is a boy and the youngest a girl? (Assume that multiple births are excluded and a girl is as likely as a boy in each birth) Get help with these problems Video and text step-by-step walkthroughs to guide you if ...
Secondly, it was already split into two groups, and the two groups by the way have absolutely zero scientific basis. There is no theory that says that if I want a girl or if I want a boy I’m going to be better able at determining whether my baby is in fact a girl or a boy....
A girl said that she wanted to be a surgeon and was going to go to medical school. When the third boy was asked about his plans, he responded that he was going to win the Powerball Lottery and be a multimillionaire. The point was that if the state approved lotteries, some people ...
There are four kinds of assumption the eldest the youngest boy girl boy boy girl girl girl boy that's to say,(a) the eldest is a girl: two case (b) at least one is a girl : three case So,the whole condition is four(here make it an A),and the suitab...