A large bank vault has several automatic burglar alarms. The probability is 0.55 that a single alarm

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A large bank vault has several automatic burglar alarms. The probability is 0.55 that a single alarm will detect a burglar.

(a) How many such alarms should be used for 99% certainty that a burglar trying to enter will be detected by at least one alarm?

(b) Suppose the bank installs nine alarms. What is the expected number of alarms that will detect a burglar?

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a p 055 Find n such that Pr 1 099 Try n 6 Six alarms sh...View the full answer

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