Introduction to Probability

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the probability of rolling a 1 on a fair six-sided die?

Back

1/6

Front

If a bag contains 5 blue marbles, 3 red marbles, and 2 green marbles, what is the total number of marbles?

Back

10 marbles.

Front

What is the formula for calculating probability?

Back

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

Front

What is the probability of drawing a blue marble from a bag with 5 blue, 3 red, and 2 green marbles?

Back

5/10 or 1/2.

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

In a spinner divided into 6 equal parts, what is the probability of spinning a number less than 4?

Back

3/6 or 1/2.

Front

What is the probability of spinning a number greater than 2 on a spinner divided into 6 equal parts?

Back

4/6 or 2/3.

Front

If an event is absolutely certain, what percent probability will it have?

Back

100%.