The following table represents the highest educational attainment of all adult residents in a certain town. If an adult is chosen randomly from the town, what is the probability that they have a high school degree or some college, but have no college degree? Round your answer to the nearest thousandth. Age 20-29 Age 30-39 Age 40-49 Age 50 & over Total High school only 1035 876 536 1862 4309 Some college 1560 1497 1600 1541 6198 Bachelor's degree 1966 1613 1266 1035 5880 Master's degree 874 688 542 1216 3320 Total 5435 4674 3944 5654 19707