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, where 0 means the event cannot happen and 1 means the event is certain.

Front

What is a simple event in probability?

Back

A simple event is an event that consists of a single outcome. For example, rolling a 3 on a number cube.

Front

What is the formula for calculating the probability of an event?

Back

The probability of an event is calculated using the formula: P(E) = Number of favorable outcomes / Total number of possible outcomes.

Front

What is the probability of rolling a 6 on a fair number cube?

Back

The probability of rolling a 6 on a fair number cube is 1/6.

Front

If a number cube is rolled twice, what is the total number of possible outcomes?

Back

The total number of possible outcomes when rolling a number cube twice is 6 x 6 = 36.

Front

What is the probability of rolling a number less than 5 on a fair number cube?

Back

The probability of rolling a number less than 5 (1, 2, 3, or 4) is 4/6 or 2/3.

Front

What is the probability of getting tails when flipping a fair coin?

Back

The probability of getting tails when flipping a fair coin is 1/2.

Front

What is the probability of picking a red pen from a box containing 3 red, 2 green, and 1 blue pen?

Back

The probability of picking a red pen is 3/6 or 1/2.

Front

What is the probability of picking a green pen after replacing a red pen?

Back

The probability of picking a green pen after replacing a red pen is 2/6 or 1/3.

Front

What is the probability of not rolling a 2 on a single die?

Back

The probability of not rolling a 2 is 5/6.