Probability with a Deck of Cards
Probability of pulling a (2)= ?
Hint: There are 52 cards in a deck with four of each number because there are four suits (diamonds, hearts, clubs, and spades)
1/13 or 19%
What is the probability of rolling snake eyes?
(two one's)
1/36 or 3%
What does Union "mean"
Or
Given a 4 color spinner with equal parts (red, blue, yellow, green) what is the probability of spinning red?
1/4 or 25%
Probability to pull the Queen of Hearts?
1/52 or 2%
P(an even number or a 1)
2/3 or 67%
1 - P(A)
It's essentially the opposite of P(A)
Given a 4 color spinner with equal parts (red, blue, yellow, green) what is the probability of spinning purple?
0
Probability of pulling a 4 OR a 7?
2/13 or 15%
Probability of rolling a 3, 5, or 0?
1/3 or 33%
When do I use the Multiplication Rule?
When I see and!
You have a bag of marbles, four red and five green. What is the probability of choosing red?
(4/9) or 44%
Suppose I pull two cards. What is the probability I pull 2 Jacks?
1/221 or .45%
DAILY DOUBLE
What is the probability of rolling a six then a number less than 3?
1/18 or 6%
What does Mutually Exclusive Events mean? Give an example.
Events that cannot happen at the same time. Example: Having a peanut allergy and not having a peanut allergy.
Given a 4 color spinner with equal parts (red, blue, yellow, green) what is the probability of spinning red then blue?
1/16 or 6%
Probability of drawing a card with a 2,3 or 4 on it?
3/13 or 23%
P(not a 2 or 3)= ?
4/6 or .67
Set of all possible outcomes
Sample space
Suppose I am flipping a coin. What is the probability I flip 3 heads in a row?
.5 x .5 x .5 = 12.5%
Probability (not an ace)= ?
12/13 or 92%
Suppose I roll a die twice. What is the probability I roll a 2, and then a 6.
1/36
DAILY DOUBLE
When do I use the Multiplication Conditional Formula?
When I have dependent events
Suppose I am rolling a die and then randomly selecting a card from a deck of 52. What is the probability of rolling a one THEN picking a red card out of a deck of cards?
1/12 or 8%
1/6 * 1/2 (half of cards are red so 1/2)