probability 8-33 - StudentOfFortune.com

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falcon6
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$0.50 probability 8-33

From Mathematics: Probability , Mathematics: Combinatorics
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Due on May. 17, 2009
Asked on May 14, 2009 at 1:08:13PM

Q:
Find the expected number of girls in a family of 5 children.
ANSWER:
33. 2.5

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b_h

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$1.00 Expected Number of Girls in a Family

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Posted on May 14, 2009 at 1:16:13PM

A:
Preview: ... ion of the family be denoted with a 5-tuple like (b,b,g,g,b) which would mean that the first two children are boys, the next two are girls and the last child is a boy.<br><br>There are 32 such tuples: there are 2 choices for each position, 5 positions so there are a total of 2*2*2*2*2 = 2^5 = ...

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Posted on May 14, 2009 at 1:32:15PM

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Preview: ... ...+5*P(5)<br>where P(0),P(1)....means probability of 0 girls, 1 girl and<br>like w ...

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Posted on May 14, 2009 at 1:37:52PM

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Preview: ... hment s ...

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