It depends on your practise.
If you have a bag of peas and beans. There are 50 peas and fifty beans in the bag. The initial one you choose is an even chance. However, in removing one and not replacing it, you have altered the proportion to 49/50, and the probability has changed.
The general population has a 50% chance of being a girl or a boy (for the sake of simplicity ignoring outliers). So taking a random person off the street, they are equally likely to be either. However, when you put them in your van, you have ever so slightly adjusted the population you can select from, so your next victim has a slightly different chance of being a girl or a boy.
Latest Answers