SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.


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1 Chapter 3: Practice SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Provide an appropriate response. ) A study of 000 randomly selected flights of a major airline showed that 798 of the flights arrived on time. What is the probability of a flight arriving on time? 2) If one card is drawn from a standard deck of 2 playing cards, what is the probability of drawing an ace? 3) If one card is drawn from a standard deck of 2 playing cards, what is the probability of drawing a red card? ) If one card is drawn from a standard deck of 2 playing cards, what is the probability of drawing a heart? ) The data in the table represent the number of consumer complaints against major U.S. airlines. If one complaint from the table is randomly selected, find the probability that it was filed against United Airlines. Airline Number of Complaints United 72 Northwest 76 Continental 63 6) The data in the table represent the number of consumer complaints against major U.S. airlines. If one complaint from the table is randomly selected, find the probability that it was filed against Continental Airlines. Airline Number of Complaints United 72 Northwest 76 Continental 63 7) The distribution of blood types for 00 Americans is listed in the table. If one donor is selected at random, find the probability of not selecting a person with blood type B+. Blood Type O+ O A+ A B+ B AB+ AB Number ) The distribution of Master's degrees conferred by a university is listed in the table. Major Frequency Mathematics 26 English 207 Engineering 63 Business 76 Education 222 What is the probability that a randomly selected student graduating with a Master's degree has a major of Engineering? Round your answer to three decimal places.
2 9) Identify the sample space of the probability experiment: answering a true or false question 0) Identify the sample space of the probability experiment: recording the number of days it snowed in Cleveland in the month of January. ) Identify the sample space of the probability experiment: determining the children's gender for a family of three children (Use B for boy and G for girl.) 2) Identify the sample space of the probability experiment: recording the day of the week and whether or not it rains. Determine the number of outcomes in the event. Then decide whether the event is a simple event or not. Explain your reasoning. 3) A computer is used to randomly select a number between and 000. Event A is selecting a number greater than 600. ) You randomly select one card from a standard deck. Event B is selecting the ace of hearts. Use the fundamental counting principle to solve the problem. ) A shirt company has designs each of which can be made with short or long sleeves. There are color patterns available. How many different shirts are available from this company? 6) A singersongwriter wishes to compose a melody. Each note in the melody must be one of the 2 notes in her vocal range. How many different sequences of 3 notes are possible? 7) How many different codes of digits are possible if the first digit must be 3,, or and if the code may not end in 0? Provide an appropriate response. 8) Classify the statement as an example of classical probability, empirical probability, or subjective probability. The probability that a train will be in an accident on a specific route is %. 9) Classify the statement as an example of classical probability, empirical probability, or subjective probability. In California's Pick Three lottery, a person selects a 3digit number. The probability of winning California's Pick Three lottery is ) Classify the events as dependent or independent. Events A and B where P(A) = 0.8, P(B) = 0.2, and P(A and B) = 0.6 2) Classify the events as dependent or independent. The events of getting two aces when two cards are drawn from a deck of playing cards and the first card is replaced before the second card is drawn. 22) Classify the events as dependent or independent. Event A: A red candy is selected from a package with 30 colored candies and eaten. Event B: A blue candy is selected from the same package and eaten. 2
3 23) A group of students were asked if they carry a credit card. The responses are listed in the table. Class Credit Card Carrier Not a Credit Card Carrier Total Freshman Sophomore 2 0 Total If a student is selected at random, find the probability that he or she owns a credit card given that the student is a freshman. Round your answer to three decimal places. 2) A group of students were asked if they carry a credit card. The responses are listed in the table. Class Credit Card Carrier Not a Credit Card Carrier Total Freshman 9 60 Sophomore Total If a student is selected at random, find the probability that he or she is a freshman given that the student owns a credit card. Round your answers to three decimal places. 2) You are dealt two cards successively without replacement from a standard deck of 2 playing cards. Find the probability that the first card is a two and the second card is a ten. Round your answer to three decimal places. 26) Find the probability of answering two true or false questions correctly if random guesses are made. Only one of the choices is correct. 27) Find the probability of getting four consecutive aces when four cards are drawn without replacement from a standard deck of 2 playing cards. 28) A multiplechoice test has five questions, each with five choices for the answer. Only one of the choices is correct. You randomly guess the answer to each question. What is the probability that you answer the first two questions correctly? 29) A multiplechoice test has five questions, each with five choices for the answer. Only one of the choices is correct. You randomly guess the answer to each question. What is the probability that you do not answer any of the questions correctly? 30) The probability it will rain is 0% each day over a threeday period. What is the probability it will rain at least one of the three days? 3) Find the probability that of 2 randomly selected students, no two share the same birthday. 32) Find the probability that of 2 randomly selected students, at least two share the same birthday. 33) Decide if the events A and B are mutually exclusive or not mutually exclusive. A die is rolled. A: The result is an odd number. B: The result is an even number. 3
4 3) Decide if the events A and B are mutually exclusive or not mutually exclusive. A date in Philadelphia is selected. A: It rains that day. B: It snows that day. 3) Decide if the events A and B are mutually exclusive or not mutually exclusive. A card is drawn from a standard deck of 2 playing cards. A: The result is a club. B: The result is a king. 36) A card is drawn from a standard deck of 2 playing cards. Find the probability that the card is an ace or a king. 37) A card is drawn from a standard deck of 2 playing cards. Find the probability that the card is an ace or a black card. 38) Given that P(A or B) = 3, P(A) =, and P(A and B) =, find P(B). 8 39) The table lists the smoking habits of a group of college students. Sex Nonsmoker Regular Smoker Heavy Smoker Total Man Woman Total If a student is chosen at random, find the probability of getting someone who is a regular or heavy smoker. Round your answer to three decimal places. 0) The table lists the smoking habits of a group of college students. Sex Nonsmoker Regular Smoker Heavy Smoker Total Man Woman Total If a student is chosen at random, find the probability of getting someone who is a man or a nonsmoker. Round your answer to three decimal places. ) One hundred people were asked, "Do you favor the death penalty?" Of the 33 that answered "yes" to the question, were male. Of the 67 that answered "no" to the question, six were male. If one person is selected at random, what is the probability that this person answered "yes" or was a male?
5 2) The distribution of Master's degrees conferred by a university is listed in the table. Assume that a student majors in only one subject. Major Frequency Mathematics 26 English 207 Engineering 8 Business 7 Education 226 What is the probability that a randomly selected student with a Master's degree majored in Business, Education or Engineering? Round your answer to three decimal places. 3) The events A and B are mutually exclusive. If P(A) = 0.3 and P(B) = 0.6, what is P(A and B)?
6 Answer Key Testname: CH3 ) ) 3 3) 2 ) ) ) ) ) ) {(true, false)} 0) {(0,, 2, 3,,, 6, 7, 8, 9, 0,..., 30, 3)} ) {(BBB), (BBG), (BGB), (GBB), (BGG), (GBG), (GGB), (GGG)} 2) {(MR, TR, WR, HR, FR, SAR, SUR, MN, TN, WN, HN, FN, SAN, SUN)} 3) 00; Not a simple event because it is an event that consists of more than a single outcome. ) ; Simple event because it is an event that consists of a single outcome. ) 0 6) 728 7) ) empirical probability 9) classical probability 20) independent 2) independent 22) dependent 23) ) ) ) ) P(Aces) = 2 28) = ) P(all five questions answers incorrect) = 30) P(rain at least one day) =  P(no rain all three days) =  (0.60)(0.60)(0.60) = ) ) ) mutually exclusive 3) not mutually exclusive 3) not mutually exclusive 2 36) 3 =
7 Answer Key Testname: CH3 37) 38) ) ) 0.92 ) ) ) 0 7
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