Thirty percent come from A1, 20% come from A2, and 50% come from A3. Suppose these units occasionally fail to perform according to their specifications and the following has been observed: 2% of those supplied by A1 fail, 5% of those supplied by A2 fail, and 3% of those supplied by A3 fail. What is the probability any one of these units provided to the government will perform without failure?