Basic Probability

Front

What is probability?

Back

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

Front

What is the probability of an event that is impossible?

Back

0

Front

What is the probability of an event that is certain?

Back

1

Front

How do you calculate the probability of an event?

Back

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

Front

If a die has 6 sides, what is the probability of rolling a 3?

Back

1/6

Front

What is the probability of rolling an odd number on a die?

Back

3/6 or 1/2

Front

What does it mean if an event is 'unlikely'?

Back

An event is unlikely if its probability is less than 0.5.

Front

What does it mean if an event is 'likely'?

Back

An event is likely if its probability is greater than 0.5.

Front

In a bag with 3 red, 2 blue, and 5 green marbles, what is the probability of picking a blue marble?

Back

2/10 or 1/5

Front

What is the probability of drawing a card that is a heart from a standard deck of 52 cards?

Back

13/52 or 1/4