Mathematics, 30.04.2021 05:50 bommat1085
Nadia's bookshelf contains 10 fiction books, two reference books, and five nonfiction books.
What is the probability that she randomly picks up a fiction book and then, without replacing it, picks up a reference book?
A. 10/289
B. 5/136
C. 1/10
D. 5/68
Answers: 1
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Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?
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An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 120 lb and 161 lb. the new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 28.1 lb. a)if a pilot is randomly selected, find the probability that his weight is between 120 lb and 161 lb.the probability is approximately? b. if 36 different pilots are randomly selected, find the probability that their mean weight is between 120 lb and 161 lb. the probability is approximately? c. when redesigning the ejection seat, which probability is more relevant? . part (b) because the seat performance for a single pilot is more important. b. part (b) because the seat performance for a sample of pilots is more important. c. part (a) because the seat performance for a sample of pilots is more important. d. part (a) because the seat performance for a single pilot is more important.
Answers: 3
Nadia's bookshelf contains 10 fiction books, two reference books, and five nonfiction books.
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