A fire detection device utilizes three temperature-sensitive cells acting independently in such a manner that any one or more may activate the alarm. Each cell possesses a probability of 0.8 of activating the alarm when the temperature reaches 100 Celsius or more. Let Y denote the number of cells activating the alarm when the temperature reaches 100.
1) Find the probability distribution of Y ?
2) Find the probability that the alarm will function when the temperature reaches 100.