Basic 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 rolling an odd number on a six-sided die?

Back

The probability is 3/6 or 1/2, since there are three odd numbers (1, 3, 5) out of six possible outcomes.

Front

What does 'impossible' mean in probability?

Back

An event that cannot happen has a probability of 0, which is termed 'impossible'.

Front

What does 'equally likely' mean?

Back

When all outcomes of an event have the same chance of occurring, they are said to be 'equally likely'.

Front

What is the probability of flipping a coin and getting tails?

Back

The probability is 1/2, as there are two possible outcomes: heads or tails.

Front

What is a fair die?

Back

A fair die is one where each of the six faces has an equal chance of landing face up.

Front

What is the probability of rolling a 3 on a six-sided die?

Back

The probability is 1/6, as there is one favorable outcome (rolling a 3) out of six possible outcomes.

Front

What is the probability of spinning a spinner and landing on a specific number?

Back

The probability depends on the total number of sections on the spinner and how many of those sections represent the specific number.

Front

What does 'unlikely' mean in probability?

Back

An event that has a low chance of occurring, but is still possible, is described as 'unlikely'.

Front

What is the probability of drawing a green marble from a jar with 5 green and 14 other marbles?

Back

The probability is 5/19, as there are 5 favorable outcomes (green marbles) out of 19 total marbles.