# hw3 answers - Assignment 3 Sociology 46B Introduction to...

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Page 1 of 4 Assignment 3 Sociology 46B Introduction to Social Research Name_____Answer Key_______ (10 Points) 1. Find the probabilities for the following problems: a. A fair coin is flipped three times. What is the probability of getting 3 tails? Y P(Y) HHH .125 P(TTT) = .125 HHT .125 P(TTT) = (.5) 3 = .125 HTT .125 HTH .125 TTT .125 TTH .125 THH .125 THT .125 b. There are four students: two are sociology majors and two are non-sociology majors. If we randomly choose one student, what is the probability of choosing a student who is a non-sociology major? Y P(Y) Soc .5 P(Non-Soc) = .5 Non-Soc .5 c. There are 54 cards in a deck. If you randomly choose a card from the deck, what is the probability of getting the queen of club? Y P(Y) Club K 1/54 P(Queen of Clubs) = 1/54 Q 1/54 J 1/54 10 1/54 9 1/54 . . . . . . Heart. .

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Page 2 of 4 (10 Points) 2. In a statewide lottery, one can buy a ticket for \$1. With probability .0000001, one wins a million dollars (\$1,000,000), and with probability .9999999 one wins nothing
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## hw3 answers - Assignment 3 Sociology 46B Introduction to...

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