QUESTION 7 An airplane has 100 seats for passengers. Assume that the probability that a person holding a ticket appears for the flight is 0.88. If the airline sells 105 tickets, what is the probability that everyone who appears for the flight will get a seat? O A. 0.983 O B. 0.997 O C. 0.893 O D. 0.671 QUESTION 8 The number of large cracks in a length of pavement along a certain street has a Poisson distribution with a mean of 1 crack per 100 m. What is the probability that there will be exactly 3 cracks in a 300 m length of pavement? O A. 0.224 O B. 0.034 O C. 0.130 O D. 0.065QUESTION 9 Silicon wafers are used in the manufacture of integrated circuits. Of the wafers manufactured by a certain process, 7% have resistances below specification and 8% have resistances above specification. If a randomly chosen wafer has a resistance that does not meet the specification, what is the probability that it is too low? O A. 0.333 O B. 0.714 O C. 0.467 O D. 0.667 QUESTION 10 The probability that a bolt meets a strength specification is 0.9. What is the probability that the bolt does not meet the specification? O A. 0.9 O B. 0.1 OC.1 O D. 1.2 QUESTION 11 Let S be the event that a randomly selected college student has taken a statistics course, and let C be the event that the same student has taken a chemistry course. Suppose P(S) = 0.5, P(C) = 0.2, and P(S n C) = 0.1. Find the probability that a student has taken statistics, chemistry, or both. O A. 0.6 O B. 0.5 O C. 0.7 O D. 0.1