Question: An apartment complex has two activating devices in each fire detector. One is smoke-activated and has a probability of .98 of sounding an alarm when it should. The second is a heat-sensitive activator and has a probability of .95 of operating when it should. Each activator operates independently of the other. Presume

a fire starts near a detector. What is the probability that both activating devices will work properly?

A. 0.049

B. 0.931

C. 0.9895

D. 0.965