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Probability

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Probability   [#permalink]

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New post 08 Mar 2017, 10:34
Probability of getting 2 heads and 4 tails when flipping a coin 6 times


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Re: Probability  [#permalink]

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New post 08 Mar 2017, 21:51
hernandezlarry1234 wrote:
Probability of getting 2 heads and 4 tails when flipping a coin 6 times


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When we flip a coin 6 times, there are \(2^6 = 64\) ways, \([ H, H, H, H, H, H ], ... , [ T, T, T, T, T, T ]\) in total.
The number of permutations with \(H, H, T, T, T, T\) is \(\frac{6!}{4!2!} = \frac{5*6}{1*2} = 15\).
Hence its probability is \(\frac{15}{64}\).
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Re: Probability &nbs [#permalink] 08 Mar 2017, 21:51
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