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July 23, 2014

July 23, 2014

Posted by **Anonymous** on Wednesday, June 27, 2012 at 1:15pm.

- common fraction -
**Count Iblis**, Wednesday, June 27, 2012 at 4:23pmProbability that Sarah throws exactly 3 heads:

Binomial[5,3] 2^(-5) = 10/32 = 5/16

Probability that Sarah does not throw excatly 3 heads is:

1 - 5/16 = 11/16

Probability that Kaleb throws exactly 3 heads:

1/8

Probability that Kaleb does not throw excatly 3 heads is:

1-1/8 = 7/8

Probability that neither Kaleb nor Sarah throw exactly 3 heads is:

11/16 * 7/8 = 77/128

Probability that either Kaleb or Sarah throw exactly 3 heads is:

1 - 77/128 = 51/128

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