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Tutorial 1 BayYuan Hsu

Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

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Page 1: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Tutorial 1

Bay‐Yuan Hsu

Page 2: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 3: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint: The probability we get a white ball at the first time is a/a+b.Use conditional probability.

Page 4: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint:  Use induction

Page 5: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint : You don’t need to give an exact probability

Page 6: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint:  [Textbook, Theorem 1.8] The algorithm outputs a min‐cut set with probability at least 2/n(n‐1). 

Page 7: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 8: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint :   1. You can list all the cases and count the probability.2. Try to think what if there are 100 curtains and Monty 

opens the rest 98 curtains?

Page 9: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint :  Think about the basic definition.

Page 10: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Hint:   1. Solve it by basic definition 2. Use memory‐less property

Page 11: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The

Advanced Question

Page 12: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 13: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 14: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 15: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 16: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 17: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 18: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The
Page 19: Tutorial 1 - NTHUCSwkhon/random11/tutorial/tutorial1.pdfshow "Let's Make a Deal" There are three curtains. Behind one curtain is a new car, and behind the other two are goats. The