An expected payoff is a probability-weighted average of possible outcomes. In a decision tree, calculate each chance node by multiplying every payoff by its conditional probability, then summing the results. section 10.2.1
Contract decision
For the healthy scenario, calculate 0.10 × $90M + 0.20 × $120M + 0.70 × $150M = $138M. For the unhealthy scenario, the corresponding value is $117M. Combining health probabilities gives 0.75 × $138M + 0.25 × $117M = $132.75M; subtracting $13M in agent fees produces a Dodgers expected payoff of $119.75M. section 10.2.1
