Aline and Sarah decide to go into business together as economic consultants. Aline believes they have a 50-50 chance of earning $200,000 a year, and that if they don't, they'll earn $0. Sarah believes they have a 75% chance of earning $100,000 and a 25% chance of earning $10,000. The expected value of the undertaking, according to Sarah, is $75,000. according to Sarah, is $100,000. according to Aline, is $200,000. according to Aline, is $100,000.