Assignment:
In our virtual world, we own a construction company and bid on projects. Based on our past history of winning bids on projects, the probability of winning the next contract to build a school is 0.40, to build a hospital is 0.30 and to build both a school and a hospital is 0.20. What is the probability of winning a contract to build either the school or the hospital? The school only? The hospital only?
Provide complete and step by step solution for the question and show calculations and use formulas.