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Assignment#1
Due: Monday, Feb. 07 in the lecture (by 9:45 am.)
Last Name , First 
Student Number {, Tutorial Section {
IMPORTANT NOTES:
1. You MUST write your Tutorial Section
(it is either A1 or A2 or A3 or A4).
2. Work independently (do not work in groups with other student(s)).
3. You MUST show your work for each question.
4. Assignments will not
be accepted after the due time and date (in fact
the solutions will be
posted soon after the due time and date).
5. Answer each question in the space provided (use extra pages if needed) AND staple all
your pages together before submitting the assignment.
Questions 1.
[3 marks.]
An urn contains 5 red and 3 blue chips. Suppose that 4 of these chips are selected
at random and transferred to a second urn, which was originally empty. If a randomly selected chip from
this second urn is blue, what is the probability that 2 red and 2 blue chips were transferred from the ±rst
urn to the second urn?
1
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 Spring '10
 ayhoo

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