A survey of 45 students revealed the following: 20 are taking chemistry 26 are taking physics 14 are taking both chemistry and physics Enter your answer as a fraction without simplifying. Decimals will not be accepted. If the probability is 13/52, then enter 13/52 as your answer (NOT 1/4 or 0.25) A student will be chosen at random. Find the probability that the student is taking chemistry or physics = Find the probability that the student is taking neither of these classes = Find the probability that the student is taking chemistry but not physics = Find the probability that the student is taking physics but not chemistry =