A woman is pregnant with twin boys. The probability of identical twins is one out of three births. They can be both boys or both girls equally (50/50), never a boy/girl or girl/boy. Fraternal twins can be any combination of gender, and are equally likely to be any of the four combinations. What is the probability the twins are identical? Use Baye's Theorem.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.9: Independent And Dependent Events
Problem 3C
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A woman is pregnant with twin boys. The probability of identical twins is one out of three births. They can be both boys or both girls equally (50/50), never a boy/girl or girl/boy. Fraternal twins can be any combination of gender, and are equally likely to be any of the four combinations. What is the probability the twins are identical? Use Baye's Theorem.

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