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# Coin is flipped

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Joined: 06 Feb 2010
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Schools: University of Dhaka - Class of 2010
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Coin is flipped [#permalink]  20 Oct 2010, 05:41
00:00

Difficulty:

15% (low)

Question Stats:

80% (01:35) correct 20% (00:41) wrong based on 30 sessions
If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2 flips?

A) 3/5
B) 1/2
C) 1/5
D) 1/8
E) 1/32
[Reveal] Spoiler: OA

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Re: Coin is flipped [#permalink]  20 Oct 2010, 06:27
(1/2) * (1/2) * (1/2) * (1/2) * (1/2) = 1/32
Re: Coin is flipped   [#permalink] 20 Oct 2010, 06:27
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