MBF3C
Unit 3, Lesson 2
Theoretical Probability
Theoretical probability is…
(Theoretical) Probability = _____________________________________________
Example 1
a) What is the probability of drawing the ace of hearts from a standard deck of cards?
b) What is the probability of drawing any ace from the deck of cards?
c) What is the probability of drawing a heart from a deck of cards?
d) What is the probability of drawing a queen or king?
e) What is the probability of drawing a red card?
MBF3C
Unit 3, Lesson 2
Example 2
Suppose you roll a pair of dice. Determine all possible values by completing the table below.
1
2
First Die
3
4
5
6
Second Die
1
2
3
4
5
6
Find the probability of rolling:
a) a six
d) a two
b) an even number
e) at least one die with a one on it.
c) An eleven
f) Both die with the same value
Example 3
Mr. Elliott needs to get ready for school. He has three pairs of pants to choose from: grey, green and blue. He
has three shirts to choose from: one blue, one green, and one white. He chooses the clothes at random from
his dresser.
Complete a table to show the possible pant-shirt combos Mr. Elliott might wear to school.
Find the probability that:
a) Mr. Elliott wears green pants and a blue shirt.
b) Mr. Elliott wears the white shirt.
c) Mr. Elliott wears pants and a shirt of the same colour.
MBF3C
Page 357 #1 – 4, 8
Unit 3, Lesson 2