Pro-Teet Insurance Company has recently been paying out more on car-theft claims than it expected  Cars with special antitheft devices or alarm systems are much less likely to be stolen than are other cars
Consequently Pro-Teet, as part of an effort to reduce its annual payouts, will offer a discount to holders of car-theft policies if their cars have antitheft devices or alarm systems
The decrease in the risk of car theft conferred by having a car alarm is greatest when only a few cars hav. e such alarms.