4.5 - 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 formula for calculating probability?

Back

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

Front

What is an expected value in probability?

Back

The expected value is the average outcome of a random event, calculated by multiplying each possible outcome by its probability and summing the results.

Front

What is a fair coin?

Back

A fair coin is one that has an equal chance of landing on heads or tails, with a probability of 0.5 for each side.

Front

What is a standard die?

Back

A standard die is a cube with six faces, each showing a different number from 1 to 6, with each face having an equal probability of 1/6.

Front

What does it mean to reduce a fraction?

Back

Reducing a fraction means simplifying it to its lowest terms by dividing the numerator and denominator by their greatest common divisor.

Front

If a spinner has 4 equal sections, what is the probability of landing on one specific section?

Back

The probability is 1/4, since there is one favorable outcome and four possible outcomes.

Front

What is the probability of selecting a child who likes chocolate if 40% like chocolate?

Back

The probability is 0.40 or 40%.

Front

How do you calculate the expected value of a game?

Back

Multiply each outcome by its probability and sum the results.

Front

What is the probability of rolling a number greater than 4 on a standard die?

Back

The probability is 1/3, since there are two favorable outcomes (5 and 6) out of six possible outcomes.