Int Math 1 Unit 8 – Day 4
Standard:
 Determine compound independent events and their probabilities.
Playing Cards
• A deck of playing cards has 52 cards.
• Suits:
•
•
•
•
Clubs
Spades
Diamonds
Hearts
• How many different face values?
• 13 total
• 4 values for each suit
• Ex: 4 Kings, 1 each of Clubs, Diamonds, etc..
What is the probability of drawing a spade?
𝑃 𝑠𝑝𝑎𝑑𝑒 =
13
52
or 1
4
Playing Cards
• A deck of playing cards has 52 cards.
• Suits:
•
•
•
•
Clubs
Diamonds
Hearts
Spades
• How many different face values?
• 13 total
• 4 values for each suit
• Ex: 4 Kings, 1 each of Clubs, Diamonds, etc..
What is the probability of drawing the Ace of spades?
𝑃 𝐴𝑐𝑒&𝑠𝑝𝑎𝑑𝑒𝑠 = 1
52
Playing Cards
• A deck of playing cards has 52 cards.
• Suits:
•
•
•
•
Clubs
Diamonds
Hearts
Spades
• How many different face values?
• 13 total
• 4 values for each suit
• Ex: 4 Kings, 1 each of Clubs, Diamonds, etc..
What is the probability of drawing a Club suit?
𝑃 𝑐𝑙𝑢𝑏 =
13
52
or
1
4
Playing Cards
• A deck of playing cards has 52 cards.
• Suits:
•
•
•
•
Clubs
Diamonds
Hearts
Spades
• How many different face values?
• 13 total
• 4 values for each suit
• Ex: 4 Kings, 1 each of Clubs, Diamonds, etc..
What is the probability of drawing a black 2?
𝑃 𝑏𝑙𝑎𝑐𝑘 2 =
2
52
or
1
26
Compound Events (Independent and dependent events)
Compound events refer to 2 or more events occurring
To find the probability of compound events, multiply the
probability of each of the events together
The probability of picking the red marble the second time is 3/5
Second Example
Practice
Practice
A box contains a penny, a nickel and a dime. Find the
probability of choosing a dime first, then without replacing
the dime, choosing the penny.
A coin is tossed and a single 6-sided die is rolled. Find
the probability of landing on the head side of the coin
and rolling a 3 on the die.
Are these dependent or independent events?
Find the probability
In Class Practice
U8D4 – ICP