Neco 2022 Geography Question 11

In a region, the probability of a flood occurring in a year is \(0.12\) and that of a landslide is \(0.08\). Both hazards can occur together with probability \(0.02\). A flood typically affects an average of 1500 people, a landslide 900 people, and when both occur the overlapping affected population is 300 people. An early‑warning system is activated for floods because the flood probability exceeds 0.10, reducing the number of people affected by floods (including the overlap) by 20%. Assuming the probabilities are independent of the early‑warning effect, calculate the expected number of distinct people affected by hazards in a year, rounded to the nearest whole person.