Question 18.6

18.6 Probability rules. To find the probability of any event,

  1. (a) add up the probabilities of the outcomes that make up the event.

  2. (b) use the probability of the outcome that best approximates the event.

  3. (c) assign it a random, but plausible, value between 0 and 1.

  4. (d) average together the personal probabilities of several experts.