请教数学

[realworld]

50%
a) and d) can not be right

Can only choose from b) and c) --> 50%

 

[闲得慌]

(50% + 25% + 25% +50%)/4 = 37.5%

总概率不能超过100%

 

[cheerup]

(50% + 25% + 25%)/3 = 33.3%

1/3
闲得慌's probability Maths is good

 

[闲得慌]

1/3
闲得慌's probability Maths is good

你的评价有权威性吗？

 

[cheerup]

你的评价有权威性吗？

权威性沒有, 你答案对倒很有信心

 

[shemozhuben]

Assume there's an answer, the probability of each answer to be the correct answer:
a) 25% -> 50%
b) 50% -> 25%
c) 60% - > 25%
d) 25% -> 50%

Two possible answers: 50% and 25%,so 50% is the probability.

Oh wait, if 50% is the probability then b) is the only answer so the probability is 25%.But then again a) and b) are 25%, we go back to 50%. It's an infinite loop。

 

[shemozhuben]

(50% + 25% + 25%)/3 = 33.3%

33.3% 不在答案中，所以答对机会是0%. 可是0%也不在答案中。

25%

如果是25%是答案，答案中有2个25%，猜对的机会应该是50%吧？

 

[cheerup]

33.3% 不在答案中，所以答对机会是0%. 可是0%也不在答案中。




如果是25%是答案，答案中有2个25%，猜对的机会应该是50%吧？

幽黙可嘉