【width0304】評論
0.4*1.15+0.3*1+0.3*0.95=0.46+0.3+0.285=1.045
【Fightingg】評論
0.4*15%+0.3*0%+0.4*(-5%)=4.5%
【Nico Chien】評論
基礎數學-期望值40%機率獲得15%報酬30%機率不變30%機率損失5%報酬期望值=40%*15%+30%*0%+30%*(-5)% =0.06+0-0.015 =0.045 =4.5%