# quiz1 - and B are mutually exclusive events then P A ∪ B...

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STA 4321/5325 - Spring 2010 Quiz 1 - January 22, 2010 Name: All problems have exactly one correct answer. Problem 1 Consider an experiment which consists of tossing a fair coin 1000 times. The total number of possible outcomes for the complete experiment is (a) 2000 (b) 1000 2 (c) 2 (d) 2 1000 Problem 2 Consider an experiment for which all outcomes are equally likely. There are 5 possible outcomes in event A and there are 9 possible outcomes in event B. Then (a) P ( A ) = P ( B ) (b) P ( A ) < P ( B ) (c) P ( A ) > P ( B ) (d) P ( A ) = 3 Problem 3 If A

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Unformatted text preview: and B are mutually exclusive events, then P ( A ∪ B ) = P ( A ) + P ( B ). This statement is (a) True (b) False Problem 4 The total number of ways of choosing r objects from n objects with replacement when order is not important is (a) C n r (b) n r (c) C n + r-1 r (d) P n r 1 Problem 5 Let us recollect that φ denotes the empty set. For every event A (a) P ( A ∩ φ ) = 0 (b) P ( A ∩ φ ) = 1 (c) P ( A ∩ φ ) = P ( A ) (d) P ( A ∩ φ ) < 2...
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quiz1 - and B are mutually exclusive events then P A ∪ B...

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