consolidated builders has bid on two large construction projects. the company president believes that the probability of winning the first contract (event a) is 0.6, that the probability of winning the second (event b) is 0.5, and that the joint probability of winning both jobs (event {a and b}) is 0.4. what is the probability of the event {a or b} that consolidated will win at least one of the jobs?

probabilityof an event {a or b} is 0.7Probability:It is the branch of mathematics concerningnumerical, descriptions of how likely aneventis to occur or how likely it is that a proposition is true. theprobabilityof an event is a number betweenmutually exclusivethen the addition rule of probability is:probabilitymethods, if two events are mutually exclusive, then the probability of either occurring is denoted as P (a ∪ b).Probabilityhere: