Sig online assessment

I got 5 questions, all 4 of them seems easy to solve,
but the one I missed was:
A bag contains 5 coins. Four of th

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time you don't know you were tossing a fair coin or not).

looks like 0.6 to me.

i agree with 17/18
https://math.stackexchange.com/q ... time-heads-turns-up

Could you also share the other 4 questions? Thank you!

4/5 * (1/2)^5 = 1/40 fair
1/5 = 1/5 heads coin

1/40 / (1/40 + 1/5) = 1/9 chance of fair coin

1/9 * 1/2 = 1/18 chance of tail

1 - 1/18 = 17/18 change of head

匿名用户 发表于 2023-5-21 12:36
looks like 0.6 to me.

Agree. law of total probability. same answer

Thank you so much for sharing the info! Could you share the rest of the four questions? Really appreciate the help!

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这题和绿皮书的unfair coin 类似，可以参考一下