Probability Basics

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 an event that is certain to happen?

Back

1 (or 100%)

Front

What is the probability of an event that is impossible?

Back

0 (or 0%)

Front

How do you calculate the probability of a single event?

Back

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

Front

If a box contains 3 limes, 5 grapes, and 2 oranges, what is the total number of fruits?

Back

10 fruits (3 limes + 5 grapes + 2 oranges)

Front

What is the probability of selecting a lime from a box with 3 limes, 5 grapes, and 2 oranges?

Back

3/10

Front

What is the probability of rolling an odd number on a 6-sided die?

Back

3/6 or 1/2 (The odd numbers are 1, 3, and 5.)

Front

What is the probability of rolling a 6 on a 6-sided die?

Back

1/6

Front

What is the probability of rolling a number greater than 4 on a 6-sided die?

Back

2/6 or 1/3 (The numbers greater than 4 are 5 and 6.)

Front

What does it mean if an event is described as 'impossible'?

Back

It means the event cannot occur at all.