Quizzlet The principle of redundancy is used when system reliability is improved through redundant or backup components. Assume that a student's alarm clock has a 19.1% daily failure rate. Complete parts (a) through (d) below

a. What is the probability that the student's alarm clock will not work on the morning of an important final exam?

b. If the student has two such alarm clocks, what is the probability that they both fail on the morning of an important final exam?

c. What is the probability of not being awakened if the student uses three independent alarm clocks?

d. Do the second and third alarm clocks result in greatly improved reliability?

A. Yes, because you can always be certain that at least one alarm clock will work.

B. No, because the malfunction of both is equally or more likely than the malfunction of one.

C. Yes, because total malfunction would not be impossible, but it would be unlikely.

D. No, because total malfunction would still not be unlikely.

In a sample of 2023 u.s. adults, 373 said franklin roosevelt was the best president since world war ii. two u.s. adults are selected at random from the population of all u.s. adults without replacement. assuming the sample is representative of all u.s. adults, complete parts (a) through (d). (a) find the probability that both adults say franklin roosevelt was the best president since world war ii. the probability that both adults say franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (b) find the probability that neither adult says franklin roosevelt was the best president since world war ii. the probability that neither adult says franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (c) find the probability that at least one of the two adults says franklin roosevelt was the best president since world war ii. the probability that at least one of the two adults says franklin roosevelt was the best president since world war ii is (round to three decimal places as needed.) (d) which of the events can be considered unusual? explain. select all that apply. the event in part left parenthesis a right parenthesis is unusual because its probability is less than or equal to 0.05. the event in part (b) is unusual because its probability is less than or equal to 0.05. none of these events are unusual. the event in part (c) is unusual because its probability is less than or equal to 0.05.

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points