Warm-up
A.
C.
2
1
+
4
5
5
10
1
5
B.
2 _ 1
6
3
D.
1
3
÷
4
2
9/12/11
1
Books
• Covering books tomorrow in class. Bring
special paper or a paper bag.
• Must bring with you EVERY day.
2
Tetrahedral Dice Example
1. Write a sample space for all the
pairs of numbers you can get if you roll two
tetrahedral dice.
3
Die #1
Die #2
1 , 1 1 , 2 1 , 3 1 , 4 2 , 1 2 , 2 2 , 3 2 , 4 3 , 1 3 , 2 3 , 3 3 , 4 4 , 1 4 , 2 4 , 3 4 , 4 2. Give the probability for the events below
a. Both dice landed on the same #.
b. Both dice landed on an odd #.
c. One die landed on an odd # and the other die landed on an even #.
d. One die landed on a 1 or a 2.
4
3. Create a probability distribution for the sum of two tetrahedral dice.
1 2 3 4
1
2
3
4
First create a
sample space for
the sum of two
tetrahedral dice
Probability distribution for the sum of two tetrahedral dice.
Sum 2 3 4 5 6
7 8 Probability 5
4. Calculate the probability for the events listed below using
your probability distribution.
Sum Probability 2 3 1/16 2/16
4 5 6
7 8 3/16 4/16 3/16 2/16 1/16 a. Calculate the probability that the sum is greater than 5.
b. Calculate the probability that the sum is at most 4.
c. Calculate the probability that the sum is less than 3
6
Homework:
Probability Worksheet #2
7