Question

A large bank vault has several automatic burglar alarms. The probability is 0.65 that a single alarm will detect a burglar.

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

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

Answer 1

Answer:

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Step-by-step explanation:

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