Vocabulary
The chance that something will happen.
What is probability
The formula for finding the probability of one event.
What is favourable outcomes ÷ total outcomes?
Probability of flipping a coin and getting heads twice in a row.
1/2
When one event does not affect another.
What is an independent event?
The formula for two independent events
What is P(A and B) = P(A) × P(B)?
A bag has 3 red marbles and 5 blue marbles. What is the probability of drawing a red marble?
Work: 3 ÷ 8
Answer: 3/8
When one event changes the outcome of the next.
What is a dependent event?
The formula for experimental probability.
What is number of successful trials ÷ total trials?
You flip a coin and roll a 6-sided die. What is the probability of getting tails and rolling a 4?
Work: 1/2 × 1/6
Answer: 1/12
What should happen based on math.
What is theoretical probability?
The probability of rolling a number on a fair 6-sided die.
What is 1/6?
A deck has 52 cards. You draw one card and do NOT replace it. What is the probability of drawing a heart, then another heart?
13/52 & 12/51
What actually happens when you test or experiment.
What is experimental probability?
The probability of flipping heads on a fair coin.
What is 1/2?
You flip a coin, roll a 6-sided die, and spin a spinner with 4 equal sections (A, B, C, D). What is the probability of getting heads, rolling an even number, and landing on C?
Work: 1/2 × 3/6 × 1/4 = 1/2 × 1/2 × 1/4 = 1/16
Answer: 1/16