The source of federal government revenue for a specific year is 50% from individual income taxes, 32% from social insurance payroll taxes, 10% from

The source of federal government revenue for a specific year is 50% from individual income taxes, 32% from social insurance payroll taxes, 10% from corporate income taxes, 3% from excise taxes and 5% other. If a revenue source is selected at random, what is the probability that it comes from individual or corporate income taxes?