We now need to attempt to find an exact value for n such that P(r ≥ 1) = 0.99. Clearly, if the bank has any chance of detecting a burglar they will need to have at least one alarm installed. So, we know that, minimally, n must be at least 1. Since n must be at least 1, suppose we start by trying n = 2, where there will be two alarms. When there are two alarms, r ≥ 1 means either one or both alarms could detect the burglar. If neither alarm detects the burglar it is considered a failure. Therefore, P(r ≥ 1) can be calculated using either of the following formulas. P(r ≥ 1) = P(1) + P(2) P(r ≥ 1) = 1 − P ( ___ ) fill in the blank

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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We now need to attempt to find an exact value for n such that P(r ≥ 1) = 0.99.


Clearly, if the bank has any chance of detecting a burglar they will need to have at least one alarm installed. So, we know that, minimally, n must be at least 1.

Since n must be at least 1, suppose we start by trying n = 2, where there will be two alarms. When there are two alarms, r ≥ 1 means either one or both alarms could detect the burglar. If neither alarm detects the burglar it is considered a failure.

Therefore, P(r ≥ 1) can be calculated using either of the following formulas.

P(r ≥ 1) = P(1) + P(2)

P(r ≥ 1) = 1 − P ( ___ )

fill in the blank

 

 

 
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