Download Statistics Review Day 16: Counting, Probability, and Logic Problems

SAT Prep Class
Unit 3: Statistics Review
Day 16: Counting, Probability, and Logic Problems
Objectives:
Find the probability that an event will occur.
Warm Up
Let the function f be defined by f(x) = x2 – 7x + 10 and f(t + 1) = 0, what is one possible value
for t?
SAT Prep Class
Unit 3: Statistics Review
Day 16: Counting, Probability, and Logic Problems
Objectives:
Find the probability that an event will occur.
Vocabulary:
The Probability of an event is
Example 1: There are 60 red marbles, 40 green marbles, and 50 blue marbles in a bag. A marble
is picked at random. What is the probability that the marble is red?
Example 2: There are 7 red marbles, 5 green marbles, and 6 blue marbles in a jar. What is the
minimum number of marbles to choose, without replacement, to guarantee that there is one of
each color marble?
Example 3: A four-digit pin number is needed to access a bank account. How many different
four-digit pin numbers are there?
Example 4: A four digit pin number is needed to access a bank account. How many different
four-digit pin numbers are possible if no number can be used twice?
Example 5: A four digit pin number is needed to access a bank account. How many different
four-digit pin numbers are possible if the first and third digits must be odd?
Example 6: A four digit pin number is needed to access a bank account. How many different
four-digit pin numbers are possible if no number can be used twice and the first and third digits
must be odd, and the second and fourth numbers must be even?
Example 7: What is the probability that a point picked at random will be in the shaded region?
Class work: p. 211 – 212
Homework: p. 217 - 219