Determine the expected number and variance of male children. A couple wishes to have children until they have exactly two female children in theirfamily.Solution:x = # of childrenp = female birth = 50%q = male birth = 50%m = # males before r%3Dr = 2 female births

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Determine the expected number and variance of male children.

A First Course in Probability (10th Edition)

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ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

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Question

Determine the expected number and variance of male children.

A couple wishes to have children until they have exactly two female children in their
family.
Solution:
x = # of children
p = female birth = 50%
q = male birth = 50%
m = # males before r
%3D
r = 2 female births

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