1. The problem statement, all variables and given/known data This problem was under applications of Bayes theorem, but I feel like I am bad at using it if thats the case: At a school 30% of the students are girls. 4% of the girls are geeks and 2% of all geeks are girls. What is probability that a random student is a geek. 2. Relevant equations Bayes theorem 3. The attempt at a solution P(AlDI) = P(DlAI)/P(DlI) *P(AlI) I guess I should assign the statement to A: a student is a geek And as my data I don't know what to use. That 4% of girls are geeks? Using Bayes theorem I found that 3/5 is the probability. Is this right and how do you arrive at it using Bayes theorem?