This preview shows pages 1–3. Sign up to view the full content.
THE UNIVERSITY OF HONG KONG
DEPARTMENT OF STATISTICS AND ACTUARIAL SCIENCE
STAT
1306
INTRODUCTORY STATISTICS
Sem 1
2008 / 2009
EXAMPLE CLASS 2
1.
A box contains 6 white and 4 black marbles. Five marbles are
selected at random. What is the probability that three are white and two
are black?
2.
At a shoe factory, it is known from past experience that the
probability that a worker who has attended the factory’s training program
will meet the production quota is 0.82 and the corresponding probability
is 0.53 for a worker who has not attended the factory’s training program.
If 60% of the workers attend the factory’s training program, what is the
probability that a worker who meets the production quota will have
attended the training program?
1
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document3.
Police records in a certain city show that 70% of all homicides are
committed by acquaintances of the victim (and the remaining 30% by
strangers). Murders by acquaintances are done with guns in 40% of cases,
with knives or fists in 50% of the cases, and by chemicals (poisons) in
This is the end of the preview. Sign up
to
access the rest of the document.
 Fall '08
 Prof
 Statistics, Probability

Click to edit the document details