問題詳情
8.David invests 100 dollars in a stock. Each year his investment doubles in value with probability 0.4and decreases in value by 50% with probability 0.6. What is the expected value of David'sinvestment after 20 years?
(A) 90
(B) 110
(C) 259
(D) 673
(E) 1745
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增