Harry intends to complete a BSc degree. He has to take either Mathematics A or Physics A in his first year.
If he takes Mathematics A, he can take chemistry A or Mathematics B in His second year. If he takes Physics A, he has to take Mathematics A in his second year.
When Harry has to make a choice between two subjects both are likely to be chosen
1. Draw a decision tree to illustrate the above situation. [6]
2. What is the probability that he will take Mathematics A during the two years? [2]
3. What is the probability that he will take Mathematics A and B during the two years? [2]