Neco 2023 Civic Education Question 22

A community can follow one of two peace‑building strategies. Strategy 1 applies mediation, then economic incentives (only if mediation succeeds), then education campaigns (only if both previous steps succeed). The probabilities of success are: mediation 0.40; economic incentives given successful mediation 0.50; education given the two previous successes 0.60. Strategy 2 skips mediation and starts with economic incentives (base success probability 0.30) followed by education (conditional success 0.55). Assuming each step is undertaken only after the preceding one succeeds, which strategy gives the higher overall probability of achieving lasting peace and what is that probability (expressed as a percentage to one decimal place)?