12.1/12.2 Likelihood and Probability

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 (impossible) and 1 (certain).

Front

What does it mean if an event has a probability of 0?

Back

It means the event is impossible and will not occur.

Front

What does it mean if an event has a probability of 1?

Back

It means the event is certain to occur.

Front

How do you calculate the probability of an event?

Back

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

Front

What is the probability of selecting a specific item from a group?

Back

It is calculated by dividing the number of that specific item by the total number of items.

Front

If a bag contains 10 red and 5 blue candies, what is the probability of selecting a red candy?

Back

Probability = 10/(10+5) = 10/15 = 2/3.

Front

What is the probability of drawing a lemon candy from a bag with 3 lemons out of 30 candies?

Back

Probability = 3/30 = 1/10.

Front

What is the probability of spinning a red on a spinner divided into 4 equal parts with 1 red?

Back

Probability = 1/4.

Front

What does 'As Likely as Not' mean in probability?

Back

It means the event has a probability of 1/2, indicating it is equally likely to happen or not happen.

Front

In a bag with 5 green, 6 yellow, 8 blue, and 7 brown candies, what is the probability of choosing a blue candy?

Back

Probability = 8/(5+6+8+7) = 8/26 = 4/13.