Basic Probability

Front

What is probability?

Back

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

Front

What is the probability of rolling a sum of 15 with a pair of six-sided dice?

Back

0 (impossible, as the maximum sum is 12).

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 spinning a fair 8-sided spinner and landing on the number 7?

Back

1/8 (since there is one favorable outcome out of 8 possible outcomes).

Front

If a class has 10% cheese, 30% pepperoni, 25% sausage, and 5% ham as favorite pizza toppings, what percent have another opinion?

Back

30% (100% - (10% + 30% + 25% + 5%) = 30%).

Front

What is the probability of NOT rolling a 2 on a single fair 6-sided die?

Back

5/6 (since there are 5 outcomes that are not 2).

Front

In a bag with 5 green, 6 yellow, 8 blue, and 7 brown M&Ms, what is the probability of choosing a blue one?

Back

8/26 or 4/13 (8 blue out of 26 total M&Ms).

Front

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

Back

An impossible event has a probability of 0, meaning it cannot occur.

Front

What is a fair die?

Back

A fair die is one where each face has an equal chance of landing face up when rolled.

Front

What is the total probability of all possible outcomes in a probability experiment?

Back

The total probability of all possible outcomes is always 1.