Simple 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 certain to happen?

Back

1 (or 100%)

Front

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

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 spinner has 5 equal sections, what is the probability of landing on any one section?

Back

1/5

Front

What is the probability of spinning a 2 when spinning a spinner with numbers 1 to 5?

Back

1/5

Front

In a bag with 4 red, 3 blue, and 5 green marbles, what is the probability of picking a blue marble?

Back

3/12 or 1/4

Front

If you roll a die, what is the probability of rolling an even number?

Back

3/6 or 1/2

Front

What is the probability of selecting a brown candy from a bowl with 2 brown candies out of 18 total candies?

Back

2/18 or 1/9

Front

What is the probability of selecting an orange candy if there are 6 orange candies out of 24 total candies?

Back

6/24 or 1/4