2 a Noah surveyed 500 sophomores and juniors about their third period classes His results are summarized in the relative frequency tab Math Science History Total 0 24 0 20 0 68 0 08 0 15 0 32 0 32 0 35 1 00 Sophomore 0 24 0 09 0 33 Junior Total Part A What is the probability that a surveyed student does not have third period history b Part B What is the probability that a surveyed junior has third period math c Part C How many surveyed students are sophomores with third period science