According to a journal article on ancient Japanese history, 1 in every 5 samurai became masterless (ronin) during the feudal age of Japan. A historian randomly and independently selected 20 samurai that served during the feudal period and is curious whether they became ronins at some points in their lives. What is the probability that at least 5 were ronins at some point in their lives? O A. 0.804 O B. 0.630 O C. 0.370 O D. 0.196

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According to a journal article on ancient Japanese history, 1 in every 5 samurai became masterless (ronin) during the feudal age of Japan. A historian randomly and independently selected 20 samurai that served during the feudal
period and is curious whether they became ronins at some points in their lives. What is the probability that at least 5 were ronins at some point in their lives?
O A. 0.804
O B. 0.630
O C. 0.370
O D. 0.196
Transcribed Image Text:According to a journal article on ancient Japanese history, 1 in every 5 samurai became masterless (ronin) during the feudal age of Japan. A historian randomly and independently selected 20 samurai that served during the feudal period and is curious whether they became ronins at some points in their lives. What is the probability that at least 5 were ronins at some point in their lives? O A. 0.804 O B. 0.630 O C. 0.370 O D. 0.196
Males of a specific bird breed leave their nesting territory for gathering food. The females will have to start looking for new partners if the their existing partners do not return in one week. If the time elapsed until the return of
existing partners has a mean of 3.5 days, what percentage of females will be forced to look for new partners?
O A. 0.135
O B. 0.249
O C. 0.865
O D. 0.751
Transcribed Image Text:Males of a specific bird breed leave their nesting territory for gathering food. The females will have to start looking for new partners if the their existing partners do not return in one week. If the time elapsed until the return of existing partners has a mean of 3.5 days, what percentage of females will be forced to look for new partners? O A. 0.135 O B. 0.249 O C. 0.865 O D. 0.751
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