A2 Probability Review

Front

What is theoretical probability?

Back

Theoretical probability is the likelihood of an event occurring based on the possible outcomes in a perfect scenario, calculated as the ratio of the number of favorable outcomes to the total number of possible outcomes.

Front

If a bag contains 5 red balls and 3 green balls, what is the total number of balls in the bag?

Back

8 (5 red + 3 green = 8 total balls).

Front

What is the formula for calculating the probability of an event?

Back

Probability (P) = Number of favorable outcomes / Total number of possible outcomes.

Front

What is the probability of choosing a 'p' from a bag containing 2 'p's and 3 other letters?

Back

P(p) = 2/5.

Front

What is the probability of not landing on purple if a spinner has 1 purple and 4 other colors?

Back

P(not purple) = 4/5.

Front

What is the range of values for probability?

Back

Probability can be expressed as a number between 0 and 1.

Front

What does it mean for events to be independent?

Back

Independent events are those where the outcome of one event does not affect the outcome of another.

Front

If a spinner is spun twice, what is the probability of landing on red first and then blue?

Back

Independent events: P(red first) * P(blue second).

Front

What is the probability of drawing two red balls from a bag containing 5 red and 3 green balls without replacement?

Back

Front

What is the probability of an event that is certain to happen?

Back

The probability of a certain event is 1.