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25 December, 06:33

23 security systems a home security system is designed to have a 99% reliability rate. suppose that nine homes equipped with this system experience an attempted burglary. find the probabilities of these events:

a. at least one of the alarms is triggered.

b. more than seven of the alarms are triggered

c. eight or fewer alarms are triggered.

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  1. 25 December, 06:46
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    C. eight or fewer

    99% means 99/100

    . with 9 alarms there is no way you can trigger 8 alarms with that 99% rate
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