There are two alternative routes joining two villages, and the cost of maintaining each route is c per year. The probablility of blockage for a maintained route is p and for an unmaintained route is 1. The cost of of there being no unblocked route between the village is b. calculate the expected costs of the following strategies: S0 - maintain neither route; S1 - maintain just one route; S2 - maintain both routes.
The answer for S0 is b, S1 is c+pb, S2 is 2c+b*p^2
but i don't know how to get these answers, can anyone please help me and show me the steps please?
thanks a lot!!