midterm - PSTAT 120A Spring 2010 Midterm in class exam This...

PSTAT 120A, Spring 2010, Midterm.
April 30, 2010 - in class exam
This exam consists of 4 questions. Answer all questions. Clear
working must be shown to receive credit.
You may answer the 4 main questions in any order, but please
keep the subparts of the questions together in your blue book.
Please start each question on a new page.
Partial credit may be given if you are unable to complete a
question but indicate clearly your initial steps.
You are allowed to bring a cheat sheet. This should not ex-
ceed one side of written/printed material on a 8” x 11” sheet
of paper.
Please write your name, section time and day, and TA’s name on
the top page of your blue book.
Good luck!
Problem 1: [10 points]
Two amateur 5-member basketball teams are formed by selecting 5 of
the 10 employees from company A and 5 of the 15 employees from
company B. Lebron works at company A and Larry works at company
B. What is the probability that :
(1) Both Lebron and Larry will play on opposing teams?