Critical Thinking For a class activity, your group has been assigned the task of generating a quiz question that requires use of the formula for conditional probability to compute P B | A . Your group comes up with the following question: “If P A and B 5 0.40 and P A 5 0.20, what is the value of P B | A ?” What is wrong with this question? Hint: Consider the answer you get when using the correct formula, P B | A 5 P A and B /P A .