Probability Theory explores the mathematical framework for quantifying uncertainty and making informed decisions based on random events.
Before jumping into calculations, take a moment to read the probability question slowly. Highlight key details such as the total number of outcomes, specific events, and any information about independence or conditions. This prevents silly mistakes and helps you choose the right method!
Noticing that the question asks about 'at least one' rather than 'exactly one'.
Realizing that cards are not replaced, which affects probability calculations.