I have no idea how to solve this problem, need help badly!!
In a given county, records show that of the registered voters, 45% are Democrats, 30% are Republicans, and 25% are Independents, In an election, 70% of the Democrats, 30% of the Republicans, and 90% of the Independents voted in favor of a parks and recreation bond proposal. If registered voter chosen at random is found to have voted in favor of the bond, what is the probability that the voter is a Republican, An Independent? A democrat?