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A couple decides to keep having children until they have the same number of boys and girls, and then stop. Assume they never have twins, that the "trials" are independent with probability...
Various campus sites have profiled our current students and alumni over the years on various topics, and reading about them can be a helpful way to get a better sense of our program and students. Ben ...
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The net effect is that even if I don't know which one is definitely a boy, the other child can only be a girl or a boy and that is always and only a 1/2 probability (ignoring any biological weighting that girls may represent 51% of births or whatever the reality is).
Use standard type for Greek letters, subscripts and superscripts that function as identifiers (i.e., are not variables, as in the subscript “girls” in the example that follows), and abbreviations that are not variables (e.g., log, GLM, WLS). Use bold type for symbols for vectors and matrices. Use italic type for all other statistical symbols.