數學_Probility_3
2009-06-03 4:35 am
In a games, a player tosses two fair coins. He wins $10 if 2 hesds occur, $5 if 1 head occur. He loses $24 if no heads occur. Calculate his expected gain for each game.
回答 (1)
2009-06-03 5:13 am
✔ 最佳答案
In a games, a player tosses two fair coins. He wins $10 if 2hesdsoccur, $5 if 1 head occur. He loses $24 if no heads occur.Calculatehis expected gain for each game.
Sol
p(2head)=1/4
p(2tail)=1/4
p(one head one tail)=1/2
expected gain for each game
=(1/4)*10+(1/2)*5+(1/4)*(－24)
=－１
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