The following table shows information collected from a survey of students regarding their grade level and transportation they use to arrive at school. What is the probability that a randomly selected eighth grader takes the bus?
A = student selected is an eighth grader B = chosen student takes bus P(A) = probability of selecting eighth grader P(A and B) = probability of selecting eighth grader AND student who takes bus P(A and B) = probability of selecting eighth grader who takes the bus P(B|A) = probability of selecting someone who takes the bus given they are an eighth grader