Exam2_Review_Exam

# Exam2_Review_Exam - Exam#2 Review Problem 1(6 points Each...

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Exam #2 Review Problem 1 (6 points) Each of us has an ABO blood type, which describes whether two characteristics called A and B are present. Every human being has two blood type alleles (gene forms), one inherited from our mother and one from our father. Each of these alleles can be A, B, or O. Which two we inherit determines our blood type. Here is a table that shows what our blood type is for each combination of two alleles: Alleles inherited Blood type A and A A A and B AB A and O A B and B B B and O B O and O O We inherit each of a parent’s two alleles with probability 0.5. We inherit independently from our mother and father. a) Elise has alleles B and O. John has alleles A and B. They have three children. What is the exact probability that all three children have blood type B (don’t round)? (3 points) b) Elise has alleles B and O. John has alleles A and B. They have three children. What is the exact probability that all three children have the same blood type (don’t round)? (3 points)

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Problem 2 (6 points) Melissa has invested 30% of her funds in T-bills and 70% of her funds in stocks. If X is the annual return on T-bills and Y the annual return on stocks, the portfolio rate of return is: R= 0.3X + 0.7Y The returns X and Y are random variables because they vary from year to year:
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## This test prep was uploaded on 02/01/2009 for the course PAM 210 taught by Professor Abdus,s. during the Fall '08 term at Cornell.

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Exam2_Review_Exam - Exam#2 Review Problem 1(6 points Each...

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