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Do Now Simplify each fraction and change
it to a decimal.
Introduction to Probability
Objective: find the probability of an event
Homework:Probability Worksheet
Probability Probability is the likelihood of an event to
occur:
P(A) Experiment is the controlled and/or
repeatable process Event is a set of possible outcomes
resulting from an experiment Outcome is a single specific possible result
of an experimentExamples: Tossing a coin – Heads, Tails Rolling a six sided die- 1, 2, 3, 4, 5, 6
Probability Theoretical probability that event A will
occur:
P(A) =
When an experiment is performed, the experimental probability of an event A is:
P(A) =
Find the probability of selecting the following number from the numbers 1
– 50.1.) an even number
2.) a perfect square
3.) a factor of 50
Find the probability of selecting the following number from the numbers 1
– 50.4.) a prime number
5.) a multiple of 4
You randomly choose a marble from a bag of 10 black, 8 red, 4 white, & 6
blue. Find the probability of choosing the given marble.
1.) choosing white
2.) against choosing red
You randomly choose a marble from a bag of 10 black, 8 red, 4 white, & 6
blue. Find the probability of choosing the given marble.
3.) choosing blue
4.) against choosing black
The results of rolling a 6-sided die is shown. Find the experimental and theoretical probability.
1.) rolling a 5 2.) rolling an even #
Roll 1 2 3 4 5 6
# of occurrances
27 22 18 26 27 30
Do Now:
The results of rolling a 6-sided die is shown. Find the experimental and
theoretical probability.
3.) rolling a # less than 5
4.) rolling any # but a 3
Roll 1 2 3 4 5 6
# of occurrances
27 22 18 26 27 30
Day 2: Probability
Objective: Find the probability of an event to occur
Homework: p811, #10-18
How many of each of the following can be found in a standard deck of cards?
1. Hearts
2. Spades
3. Clubs
4. Diamonds
5. Number Cards
6. Suits
7. Total in Deck
8. Red Cards
9. Black Cards
A card is randomly selected from a standard 52-card deck. Find the
probability of drawing the given card.1.) the king of diamonds
2.) a spade
3.) a 4
A card is randomly selected from a standard 52-card deck. Find the
probability of drawing the given card.4.) a king
5.) a red card
6.) a face card
Probability of Compound Events The union or intersection of two events
is called a compound event.
“or” : add
“and” : multiply
You must subtract repeated events
A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated
card. 1.) A heart or a diamond
2.) A spade or an even card
A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated
card. 3.) A 6 or a 7
4.) An ace or a spade
You randomly choose a marble from a bag of 10 black, 8 red, 4 white, & 6
blue. Find the probability of choosing the given marble.
5.) choosing blue or black
6.) choosing red or white
