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Danny, Doris and Dolly flipped a coin 5 times and each time

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Senior Manager
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Danny, Doris and Dolly flipped a coin 5 times and each time [#permalink]

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New post 26 Jan 2006, 17:37
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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Danny, Doris and Dolly flipped a coin 5 times and each time the coin landed on “headsâ€
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New post 26 Jan 2006, 18:29
1/2 since the prior events are independent of what happens next.
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New post 26 Jan 2006, 21:40
B it is)) :wink:
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New post 26 Jan 2006, 21:42
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Flipping of coin is an independent event. The chance of landing on the tail on the 6th toss wil be 1/2
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New post 27 Jan 2006, 01:06
By logic this seems 1/2. But I am thinking something else (I don't know why).

Is it 1/4?? If correct, I will explain.
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New post 27 Jan 2006, 03:04
The results are independent from each other, so the answer is 1/2.

However, if the coin landed five times on head, for which the prob is (1/2)^5, which is relatively little, it is possible that the coins isn't fair, resulting in a prob of 0 :wink:
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 [#permalink]

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New post 27 Jan 2006, 07:22
The OA is B.

and the OE is:
The probability of the coin is independent on its previous outcomes and therefore the probability for “headâ€
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New post 27 Jan 2006, 11:00
1/2.

This is good one ;)
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Re: Danny, Doris and Dolly flipped a coin 5 times and each time [#permalink]

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New post 25 Jan 2018, 06:37
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Re: Danny, Doris and Dolly flipped a coin 5 times and each time   [#permalink] 25 Jan 2018, 06:37
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Danny, Doris and Dolly flipped a coin 5 times and each time

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