16. On any given day, a salesman can earn $0 with a 30% probability, $100 with a20% probability, or
問題詳情
16. On any given day, a salesman can earn $0 with a 30% probability, $100 with a20% probability, or $300 with a 50% probability. His expected earnings equal (A) $0. (B) $100. (C)$150. (D) $170.